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Patent
   D282767
Priority
Apr 06 1982
Filed
Apr 06 1982
Issued
Feb 25 1986
Expiry
Feb 25 2000
Inventors
Shofner, F…
Assg.orig
PPM, INC
Assg.curr
ppm, Inc.
Entity
unknown
Referenced by
14
References
20
Maint.:
n/a
The ornamental design for a filter unit, as shown.

FIG. 1 is a perspective view of a filter unit of my new appearance design as it appears in operation suspended from overhead and with filter media in place;

FIG. 2 is an additional perspective view of the filter unit of FIG. 1 showing the bottom, rear and opposite sides not visible in FIG. 1; and

FIG. 3 is a perspective view from the same orientation as FIG. 1, but showing the appearance of the filter unit with the filter media and rolls removed.
INVENTORS:

Shofner, Frederick M.

THIS PATENT IS REFERENCED BY THESE PATENTS:
Patent Priority Assignee Title
5676177, Nov 02 1994 Shofner Engineering Associates, Inc. Method for optimally processing materials in a machine
5910598, Nov 02 1994 SHOFNER ENGINEERING ASSOCIATES, INC A CORPORATION O F TENNESSEE Modular process zone and personnel zone environmental control with dedicated air jet cleaning
7615152, Aug 23 2001 Helen of Troy Limited Water filter device
7740765, Aug 23 2001 Helen of Troy Limited Methods for treating water
7740766, Aug 23 2001 Helen of Troy Limited Methods for treating water
7749394, Aug 23 2001 Helen of Troy Limited Methods of treating water
7850859, Aug 23 2001 Helen of Troy Limited Water treating methods
7922008, Aug 23 2001 Helen of Troy Limited Water filter materials and water filters containing a mixture of microporous and mesoporous carbon particles
8119012, Aug 23 2001 Helen of Troy Limited Water filter materials and water filters containing a mixture of microporous and mesoporous carbon particles
D291825, Dec 21 1984 Penn Plax Plastics, Inc. Aquarium filter cartridge
D318092, Feb 20 1990 Water filter or similar article
D318093, Feb 20 1990 Water filter or similar article
D326706, Dec 06 1989 AB PH NEDERMAN & CO Air filter housing for use in a factory, laboratory or the like
D501912, Aug 19 2003 Procter & Gamble Company, The Water filter device
THIS PATENT REFERENCES THESE PATENTS:
Patent Priority Assignee Title
2763139,
2887567,
3596442,
3745750,
3861894,
3954427, Oct 16 1973 SNYDERGENERAL CORPORATION, 3620 TRAMMELL CROW CENTER, DALLAS, TX , A CORP OF MN Ventilation and filter module for cooking units
4011067, Jan 30 1974 Minnesota Mining and Manufacturing Company Filter medium layered between supporting layers
4226715, Sep 24 1979 The Terrell Machine Company Apparatus and method for separating entrained particulate matter from a conveying fluid
4277255, Dec 02 1979 Aktiebolaget Svenska Flaktfabriken Cleaning process control method for textile barrier filter material
4301095, Aug 18 1980 Product Enterprise, Inc. Air freshener dispenser
4370155, Nov 04 1980 Air circulating device
4378980, Nov 09 1981 HAMMOND, JAMES Gas borne particle filtering apparatus
147357,
204722,
238296,
D248869, Jan 14 1977 Air purifier
D258686, Jan 15 1979 Combined air filter and freshener
DE2717613,
DE939098,
SU2800703,
ASSIGNMENT RECORDS    Assignment records on the USPTO
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Executed onAssignorAssigneeConveyanceFrameReelDoc
Apr 05 1982SHOFNER, FREDERICK M PPM, INC ASSIGNMENT OF ASSIGNORS INTEREST 0039850132 pdf
Apr 06 1982ppm, Inc.(assignment on the face of the patent)
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