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Publication numberUSD233508 S
Publication typeGrant
Publication dateNov 5, 1974
Filing dateAug 28, 1972
Publication numberUS D233508 S, US D233508S, US-S-D233508, USD233508 S, USD233508S
InventorsPrimo L. Pinofri
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Dual comparative falling ball viscometer
US D233508 S
Abstract  available in
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Description  (OCR text may contain errors)

e 1) .Z33,508 Umted States Patent 0 ce Patented 31 1974 DUAL COMPARATIVE FALLING BALL VISCOMETER Primo L. Pinotti, Lafayette, Califl, assignor to Chevron Research Company, San Francisco, Calif;

- Filed Aug. 28, 1972, Ser. No. 284,387

Term of patent 14 years t Int. Cl. D10-05 us. Cl. BIO-84 The figure is a perspective view of the dual compara- References Cited tive falling bell viscometer showing my new design. UNITED STATES PATENTS The spherical bOCllCS shown 1n the viscometer are not stationary and their position in the figure is merely repre- 2,700,228 1/1955 Famma" 7357 sentativc. 1,600,250 9/1926 Santakoff 73-57 I claim: 1,459,262 6/1923 Rode D52-6 R The ornamental design for a dual comparative falling ball viscometer, substantially as shown and described. NELSON HOLTJE Primary Examiner