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The ornamental design for a viscometer substantially, as shown and described. |
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FIG. 1 is a left side elevational view of a viscometer showing my new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a top plan view thereof;
FIG. 5 is a top and left front perspective view thereof.
| Patent | Priority | Assignee | Title |
| D270818, | Mar 16 1981 | Vibrating viscometer probe | |
| D270819, | Mar 16 1981 | Sample holder for a vibrating viscometer | |
| D271570, | Aug 06 1981 | MI DRILLING FLUIDS COMPANY, HOUSTON, TEXAS A TEXAS GENERAL PARTNERSHIP | High temperature, high pressure filter press for testing drilling fluids or similar apparatus |
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Nov 19 1979 | Halliburton Company | (assignment on the face of the patent) | / | |||
| Dec 11 1986 | HALLIBURTON COMPANY, A CORP OF DE | MI DRILLING FLUIDS COMPANY, HOUSTON, TEXAS A TEXAS GENERAL PARTNERSHIP | ASSIGNMENT OF ASSIGNORS INTEREST | 004679 | /0821 |
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