Funnel viscosimeter

Details Funnel viscosimeter Funnel viscosimeter

2006-03-28

2008-12-09

Larkin, Daniel S (Department: 2856)

Measuring and testing

Liquid analysis or analysis of the suspension of solids in a...

Viscosity

C141S331000, C141S334000, C141S335000, C141S336000, C222S460000

Reexamination Certificate

active

07461542

ABSTRACT:
A Marsh funnel is equipped with a valve at the funnel outlet. The valve may be of the quick opening type selected from stem valves (internal of the funnel), ball valves, plug valves, flapper valves, butterfly valves, slide valves and the like.

REFERENCES:
patent: 326566 (1885-09-01), Jochum
patent: 343871 (1886-06-01), Van Kamman
patent: 3074266 (1963-01-01), Sadler et al.
patent: 3748201 (1973-07-01), Jordan
patent: 4184771 (1980-01-01), Day
patent: 6474143 (2002-11-01), Herod
patent: 7114536 (2006-10-01), Guthrie
patent: 2006/0209626 (2006-09-01), Kojima et al.
patent: 60-52422 (1985-03-01), None
OFI Testing Equipment, INC.—OFITE Plastic Marsh Funnel Viscometer, Mar. 17, 2004, p. 1.
M.J. Pitt, The Marsh Funnel and Drilling Fluid Viscosity: A New Equation for Field Use, SPE Drill, & Completion, Mar. 2000, pp. 3-6.
Hallan N. Marsh, Properties and Treatment of Rotary Mud, American Institue of Mining & Metallurgical Engineers, Oct. 1930, pp. 234-249.
USPTO web search, Hits 1 thru 41, Refine search “Marsh Funnel”.

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