| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Nov 19 1990 | ALEXANDER, GEORGE H JR | BETZ LABORATORIES, INC , A CORP OF PA | ASSIGNMENT OF ASSIGNORS INTEREST | 005558 | /0406 |
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| Nov 19 1990 | RODGERS, JAMES C | BETZ LABORATORIES, INC , A CORP OF PA | ASSIGNMENT OF ASSIGNORS INTEREST | 005558 | /0406 |
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| Nov 19 1990 | LAWHON, DAVIE B | BETZ LABORATORIES, INC , A CORP OF PA | ASSIGNMENT OF ASSIGNORS INTEREST | 005558 | /0406 |
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| Jan 03 1991 | | Betz Laboratories, Inc. | (assignment on the face of the patent) | | / |
| Nov 14 2000 | WSP, INC , A DELAWARE CORPORATION | BANK OF AMERICA, N A AS COLLATERAL AGENT | NOTICE OF GRANT OF SECURITY INTEREST | 011400 | /0719 |
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| Nov 14 2000 | HERCULES SHARED SERIVCES CORPORATION, A DELAWARE CORPORATION | BANK OF AMERICA, N A AS COLLATERAL AGENT | NOTICE OF GRANT OF SECURITY INTEREST | 011400 | /0719 |
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| Nov 14 2000 | BLI HOLDINGS CORP , A DELAWARE CORPORATION | BANK OF AMERICA, N A AS COLLATERAL AGENT | NOTICE OF GRANT OF SECURITY INTEREST | 011400 | /0719 |
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| Nov 14 2000 | BL TECHNOLOGIES, INC , A DELAWARE CORPORATION | BANK OF AMERICA, N A AS COLLATERAL AGENT | NOTICE OF GRANT OF SECURITY INTEREST | 011400 | /0719 |
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| Nov 14 2000 | D R C LTD , A DELAWARE CORPORATION | BANK OF AMERICA, N A AS COLLATERAL AGENT | NOTICE OF GRANT OF SECURITY INTEREST | 011400 | /0719 |
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| Nov 14 2000 | BETZDEARBORN EUROPE, INC , A PENNSULVANIA CORPORATION | BANK OF AMERICA, N A AS COLLATERAL AGENT | NOTICE OF GRANT OF SECURITY INTEREST | 011400 | /0719 |
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| Nov 14 2000 | BETZDEARBORN INC , A PENNSYLVANIA CORPORATION | BANK OF AMERICA, N A AS COLLATERAL AGENT | NOTICE OF GRANT OF SECURITY INTEREST | 011400 | /0719 |
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| Nov 14 2000 | FIBERVISIONS PRODUCTS, INC , A GEORGIA CORPORATION | BANK OF AMERICA, N A AS COLLATERAL AGENT | NOTICE OF GRANT OF SECURITY INTEREST | 011400 | /0719 |
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| Nov 14 2000 | HERCULES FLAVOR, INC , A DELAWARE CORPORATION | BANK OF AMERICA, N A AS COLLATERAL AGENT | NOTICE OF GRANT OF SECURITY INTEREST | 011400 | /0719 |
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| Nov 14 2000 | FIBERVISIONS, L L C , A DELAWARE LIMITED LIABILITY COMPANY | BANK OF AMERICA, N A AS COLLATERAL AGENT | NOTICE OF GRANT OF SECURITY INTEREST | 011400 | /0719 |
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| Nov 14 2000 | HERCULES FINANCE COMPANY, A DELAWARE PARTNERSHIP | BANK OF AMERICA, N A AS COLLATERAL AGENT | NOTICE OF GRANT OF SECURITY INTEREST | 011400 | /0719 |
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| Nov 14 2000 | AQUALON COMPANY, A DELAWARE PARTNERSHIP | BANK OF AMERICA, N A AS COLLATERAL AGENT | NOTICE OF GRANT OF SECURITY INTEREST | 011400 | /0719 |
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| Nov 14 2000 | FIBERVISIONS INCORPORATED, A DELAWARE CORPORATION | BANK OF AMERICA, N A AS COLLATERAL AGENT | NOTICE OF GRANT OF SECURITY INTEREST | 011400 | /0719 |
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| Nov 14 2000 | ATHENS HOLDINGS, INC , A DELAWARE CORPORATION | BANK OF AMERICA, N A AS COLLATERAL AGENT | NOTICE OF GRANT OF SECURITY INTEREST | 011400 | /0719 |
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| Nov 14 2000 | BETZDEARBORN INTERNATIONAL, INC , A PENNSYLVANIA CORPORATION | BANK OF AMERICA, N A AS COLLATERAL AGENT | NOTICE OF GRANT OF SECURITY INTEREST | 011400 | /0719 |
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| Nov 14 2000 | HISPAN CORPORATION, A DELAWARE CORPORATION | BANK OF AMERICA, N A AS COLLATERAL AGENT | NOTICE OF GRANT OF SECURITY INTEREST | 011400 | /0719 |
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| Nov 14 2000 | HERCULES INVESTMENTS, LLC, A DELAWARE LIMITED LIABILITY COMPANY | BANK OF AMERICA, N A AS COLLATERAL AGENT | NOTICE OF GRANT OF SECURITY INTEREST | 011400 | /0719 |
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| Nov 14 2000 | HERCULES INTERNATIONAL LIMITED, L L C , A DELAWARE LIMITED LIABILITY COMPANY | BANK OF AMERICA, N A AS COLLATERAL AGENT | NOTICE OF GRANT OF SECURITY INTEREST | 011400 | /0719 |
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| Nov 14 2000 | HERCULES EURO HOLDING, LLC, A DELAWARE LIMITED LIAILITY COMPANY | BANK OF AMERICA, N A AS COLLATERAL AGENT | NOTICE OF GRANT OF SECURITY INTEREST | 011400 | /0719 |
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| Nov 14 2000 | HERCULES COUNTRY CLUB, INC , A DELAWARE CORPORATION | BANK OF AMERICA, N A AS COLLATERAL AGENT | NOTICE OF GRANT OF SECURITY INTEREST | 011400 | /0719 |
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| Nov 14 2000 | FIBERVISIONS, L P , A DELAWARE LIMITED PARTNERSHIP | BANK OF AMERICA, N A AS COLLATERAL AGENT | NOTICE OF GRANT OF SECURITY INTEREST | 011400 | /0719 |
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| Nov 14 2000 | EAST BAY REALTY SERVICES, INC , A DELAWARE CORPORATION | BANK OF AMERICA, N A AS COLLATERAL AGENT | NOTICE OF GRANT OF SECURITY INTEREST | 011400 | /0719 |
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| Nov 14 2000 | COVINGTON HOLDINGS, INC , A DELAWARE CORPORATION | BANK OF AMERICA, N A AS COLLATERAL AGENT | NOTICE OF GRANT OF SECURITY INTEREST | 011400 | /0719 |
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| Nov 14 2000 | CHEMICAL TECHNOLOGIES INDIA, LTD, A DELAWARE CORPORATION | BANK OF AMERICA, N A AS COLLATERAL AGENT | NOTICE OF GRANT OF SECURITY INTEREST | 011400 | /0719 |
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| Nov 14 2000 | BL CHEMICALS INC , A DELAWARE CORPORATION | BANK OF AMERICA, N A AS COLLATERAL AGENT | NOTICE OF GRANT OF SECURITY INTEREST | 011400 | /0719 |
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| Nov 14 2000 | BETZDEARBORN CHINA, LTD , A DELAWARE CORPORATION | BANK OF AMERICA, N A AS COLLATERAL AGENT | NOTICE OF GRANT OF SECURITY INTEREST | 011400 | /0719 |
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| Nov 14 2000 | HERECULES CREDIT, INC , A DELAWARE CORPORATION | BANK OF AMERICA, N A AS COLLATERAL AGENT | NOTICE OF GRANT OF SECURITY INTEREST | 011400 | /0719 |
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| Nov 14 2000 | HERCULES INCORPORATED, A DELAWARE CORPORATION | BANK OF AMERICA, N A AS COLLATERAL AGENT | NOTICE OF GRANT OF SECURITY INTEREST | 011400 | /0719 |
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| Nov 14 2000 | HERCULES CHEMICAL CORPORATION, A DELAWARE CORPORATION | BANK OF AMERICA, N A AS COLLATERAL AGENT | NOTICE OF GRANT OF SECURITY INTEREST | 011400 | /0719 |
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| Nov 14 2000 | HERCULES INTERNATIONAL LIMITED, A DELAWARE CORPORATION | BANK OF AMERICA, N A AS COLLATERAL AGENT | NOTICE OF GRANT OF SECURITY INTEREST | 011400 | /0719 |
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| Dec 19 2002 | BANK OF AMERICA, N A , AS COLLATERAL AGENT | D R C LTD | RELEASE OF SECURITY INTEREST | 013691 | /0642 |
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| Dec 19 2002 | BANK OF AMERICA, N A , AS COLLATERAL AGENT | BETZDEARBORN EUROPE, INC | RELEASE OF SECURITY INTEREST | 013691 | /0642 |
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| Dec 19 2002 | BANK OF AMERICA, N A , AS COLLATERAL AGENT | BETZDEARBORN, INC | RELEASE OF SECURITY INTEREST | 013691 | /0642 |
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| Dec 19 2002 | BANK OF AMERICA, N A , AS COLLATERAL AGENT | HERCULES INTERNATIONAL LIMITED | RELEASE OF SECURITY INTEREST | 013691 | /0642 |
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| Dec 19 2002 | BANK OF AMERICA, N A , AS COLLATERAL AGENT | FIBERVISIONS PRODUCTS, INC | RELEASE OF SECURITY INTEREST | 013691 | /0642 |
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| Dec 19 2002 | BANK OF AMERICA, N A , AS COLLATERAL AGENT | FIBERVISIONS INCORPORATED | RELEASE OF SECURITY INTEREST | 013691 | /0642 |
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| Dec 19 2002 | BANK OF AMERICA, N A , AS COLLATERAL AGENT | HISPAN CORPORATION | RELEASE OF SECURITY INTEREST | 013691 | /0642 |
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| Dec 19 2002 | BANK OF AMERICA, N A , AS COLLATERAL AGENT | FIBERVISIONS, L L C | RELEASE OF SECURITY INTEREST | 013691 | /0642 |
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| Dec 19 2002 | BANK OF AMERICA, N A , AS COLLATERAL AGENT | HERCULES FINANCE COMPANY | RELEASE OF SECURITY INTEREST | 013691 | /0642 |
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| Dec 19 2002 | BANK OF AMERICA, N A , AS COLLATERAL AGENT | Aqualon Company | RELEASE OF SECURITY INTEREST | 013691 | /0642 |
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| Dec 19 2002 | BANK OF AMERICA, N A , AS COLLATERAL AGENT | WSP, INC | RELEASE OF SECURITY INTEREST | 013691 | /0642 |
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| Dec 19 2002 | BANK OF AMERICA, N A , AS COLLATERAL AGENT | HERCULES FLAVOR, INC | RELEASE OF SECURITY INTEREST | 013691 | /0642 |
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| Dec 19 2002 | BANK OF AMERICA, N A , AS COLLATERAL AGENT | HERCULES CREDIT, INC | RELEASE OF SECURITY INTEREST | 013691 | /0642 |
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| Dec 19 2002 | BANK OF AMERICA, N A , AS COLLATERAL AGENT | BL TECHNOLOGIES, INC | RELEASE OF SECURITY INTEREST | 013691 | /0642 |
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| Dec 19 2002 | BANK OF AMERICA, N A , AS COLLATERAL AGENT | BLI HOLDING CORPORATION | RELEASE OF SECURITY INTEREST | 013691 | /0642 |
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| Dec 19 2002 | BANK OF AMERICA, N A , AS COLLATERAL AGENT | HERCULES SHARED SERVICES CORPORATION | RELEASE OF SECURITY INTEREST | 013691 | /0642 |
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| Dec 19 2002 | BANK OF AMERICA, N A , AS COLLATERAL AGENT | HERCULES INVESTMENTS, LLC | RELEASE OF SECURITY INTEREST | 013691 | /0642 |
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| Dec 19 2002 | BANK OF AMERICA, N A , AS COLLATERAL AGENT | HERCULES INTERNATIONAL LIMITED, L L C | RELEASE OF SECURITY INTEREST | 013691 | /0642 |
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| Dec 19 2002 | BANK OF AMERICA, N A , AS COLLATERAL AGENT | HERCULES EURO HOLDINGS, LLC | RELEASE OF SECURITY INTEREST | 013691 | /0642 |
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| Dec 19 2002 | BANK OF AMERICA, N A , AS COLLATERAL AGENT | HERCULES COUNTRY CLUB, INC | RELEASE OF SECURITY INTEREST | 013691 | /0642 |
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| Dec 19 2002 | BANK OF AMERICA, N A , AS COLLATERAL AGENT | HERCULES CHEMICAL CORPORATION | RELEASE OF SECURITY INTEREST | 013691 | /0642 |
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| Dec 19 2002 | BANK OF AMERICA, N A , AS COLLATERAL AGENT | EAST BAY REALTY SERVICES, INC | RELEASE OF SECURITY INTEREST | 013691 | /0642 |
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| Dec 19 2002 | BANK OF AMERICA, N A , AS COLLATERAL AGENT | FIBERVISONS, L P | RELEASE OF SECURITY INTEREST | 013691 | /0642 |
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| Dec 19 2002 | BANK OF AMERICA, N A , AS COLLATERAL AGENT | COVINGTON HOLDINGS, INC | RELEASE OF SECURITY INTEREST | 013691 | /0642 |
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| Dec 19 2002 | BANK OF AMERICA, N A , AS COLLATERAL AGENT | CHEMICAL TECHNOLOGIES INDIA, LTD | RELEASE OF SECURITY INTEREST | 013691 | /0642 |
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| Dec 19 2002 | BANK OF AMERICA, N A , AS COLLATERAL AGENT | BL CHEMICALS INC | RELEASE OF SECURITY INTEREST | 013691 | /0642 |
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| Dec 19 2002 | BANK OF AMERICA, N A , AS COLLATERAL AGENT | BETZDEARBORN CHINA, LTD | RELEASE OF SECURITY INTEREST | 013691 | /0642 |
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| Dec 19 2002 | BANK OF AMERICA, N A , AS COLLATERAL AGENT | ATHENS HOLDING, INC | RELEASE OF SECURITY INTEREST | 013691 | /0642 |
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| Dec 19 2002 | BANK OF AMERICA, N A , AS COLLATERAL AGENT | BETZDEARBORN INTERNATIONAL, INC | RELEASE OF SECURITY INTEREST | 013691 | /0642 |
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| Dec 19 2002 | BANK OF AMERICA, N A , AS COLLATERAL AGENT | Hercules Incorporated | RELEASE OF SECURITY INTEREST | 013691 | /0642 |
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