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Patent
   D268820
Priority
Mar 09 1981
Filed
Mar 09 1981
Issued
May 03 1983
Expiry
May 03 1997
Inventors
Cain, Davi…
Assg.orig
Halliburto…
Assg.curr
MI DRILLIN…
Entity
unknown
Referenced by
1
References
7
Maint.:
n/a
The ornamental design for pressurized density measuring apparatus, substantially as shown and described.

FIG. 1 is a front elevational view of a pressurized density measuring apparatus showing my new design, the rear being a mirror image thereto;

FIG. 2 is a top plan view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof.
INVENTORS:

Cain, David E.

THIS PATENT IS REFERENCED BY THESE PATENTS:
Patent Priority Assignee Title
D290690, Dec 03 1984 Seed scale
THIS PATENT REFERENCES THESE PATENTS:
Patent Priority Assignee Title
2132736,
3057421,
3747415,
186243,
D262693, Mar 17 1980 MI DRILLING FLUIDS COMPANY, HOUSTON, TEXAS A TEXAS GENERAL PARTNERSHIP Density measuring balance
81832,
98977,
ASSIGNMENT RECORDS    Assignment records on the USPTO
///
Executed onAssignorAssigneeConveyanceFrameReelDoc
Mar 09 1981Halliburton Company(assignment on the face of the patent)
Jun 30 1981CAIN DAVID E HALLIBURTON COMPANY, A CORP OF DE ASSIGNMENT OF ASSIGNORS INTEREST 0038830027 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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