Kemp; Willard E.

Patent Applications and Registrations

Patent applications and USPTO patent grants for Kemp; Willard E..The latest application filed is for "ball valve having annular springs seats".

Company Profile

0.17.3

Kemp; Willard E. - Houston TX

*profile and listings may contain filings by different individuals or companies with the same name. Review application materials to confirm ownership/assignment.

Patent Activity

Patent	Date
Ball valve having annular springs seats App 20070252102 - Kemp; Willard E.	2007-11-01
Ball valve having annular spring seats App 20050173665 - Kemp, Willard E.	2005-08-11
Apparatus and process for treating a particulate material within a rotating retort Grant 6,773,521 - Kemp August 10, 2	2004-08-10
Apparatus and process for treating a particulate material within a rotating retort App 20020112792 - Kemp, Willard E.	2002-08-22
Ball valve having retractable sealing member Grant 6,425,570 - Kemp July 30, 2	2002-07-30
Apparatus and process for treating a particulate material within a rotating retort Grant 6,379,610 - Kemp April 30, 2	2002-04-30
Inline control valve for controlling fluid flow Grant 5,435,337 - Kemp July 25, 1	1995-07-25
Process for surface hardening of refractory metal workpieces Grant 5,399,207 - Kemp March 21, 1	1995-03-21
Process for surface hardening of refractory metal workpieces Grant 5,316,594 - Kemp May 31, 1	1994-05-31
Apparatus and method for detecting fluid leakage Grant 5,170,659 - Kemp December 15, 1	1992-12-15
Inline check valve Grant 4,911,196 - Kemp March 27, 1	1990-03-27
Seat assembly for ball valves Grant 4,911,408 - Kemp March 27, 1	1990-03-27
Ball valve Grant 4,899,980 - Kemp February 13, 1	1990-02-13
Gate valve Grant D292,820 - Kemp November 17, 1	1987-11-17
Process for hot isostatic pressing of a metal workpiece Grant 4,379,725 - Kemp April 12, 1	1983-04-12
Method and apparatus for preheating, positioning and holding objects Grant 4,249,889 - Kemp February 10, 1	1981-02-10
Foundry process including heat treating of produced castings in formation sand Grant 4,222,429 - Kemp September 16, 1	1980-09-16
Fire-safe valve structure Grant 4,160,460 - Kemp July 10, 1	1979-07-10
Valve Structure Having Fluid Pressure Actuated Sealing Members Grant 3,776,506 - Fowler , et al. December 4, 1	1973-12-04
Sealing Means For Valve Structure Grant 3,760,833 - Kemp , et al. September 25, 1	1973-09-25

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