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Patent
   D274227
Priority
Mar 09 1981
Filed
Mar 09 1981
Issued
Jun 12 1984
Expiry
Jun 12 1998
Inventors
Cain, Davi…
Assg.orig
Halliburto…
Assg.curr
MI DRILLIN…
Entity
unknown
Referenced by
2
References
14
Maint.:
n/a
The ornamental design for a hydraulic filter press for pressing liquid from a drilling mud or the like, as shown and described.

FIG. 1 is a front elevation of a hydraulic filter press for pressing liquid from a drilling mud, showing my new design; and

FIG. 2 is a right-side elevation thereof.
INVENTORS:

Cain, David E.

THIS PATENT IS REFERENCED BY THESE PATENTS:
Patent Priority Assignee Title
D283016, Jul 25 1983 MILTON INDUSTRIES, INC. Quick connecting cylinder air leakage tester
D318710, Aug 15 1988 Fuel line filter
THIS PATENT REFERENCES THESE PATENTS:
Patent Priority Assignee Title
2084439,
2451390,
2866455,
316048,
3747415,
3898010,
4154543, Apr 28 1978 CATERPILLAR INC , A CORP OF DE Apparatus for disassembly of a tapered connection using fluid pressure
4299118, Nov 19 1979 MI DRILLING FLUIDS COMPANY, HOUSTON, TEXAS A TEXAS GENERAL PARTNERSHIP Viscometer
978265,
166330,
180685,
231389,
D263568, Jun 04 1979 Strength meter
D264444, Sep 28 1979 Gretag Aktiengesellschaft Densitymeter
ASSIGNMENT RECORDS    Assignment records on the USPTO
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Executed onAssignorAssigneeConveyanceFrameReelDoc
Mar 09 1981Halliburton Company(assignment on the face of the patent)
Jun 29 1981CAIN DAVID E HALLIBURTON COMPANY, A CORP OF DEASSIGNMENT OF ASSIGNORS INTEREST 0038830026 pdf
Dec 11 1986HALLIBURTON COMPANY, A CORP OF DE MI DRILLING FLUIDS COMPANY, HOUSTON, TEXAS A TEXAS GENERAL PARTNERSHIPASSIGNMENT OF ASSIGNORS INTEREST 0046790821 pdf
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