Inventor · disambiguated record
Willard E. Kemp
Also filed as: KEMP WILLARD E
43 granted patents·2 pending applications·891 citations·filing 1976–2007
98Inventor score
Top patents by PatentIndex Score
45 records- 0198US5170659AApparatus and method for detecting fluid leakageKEMP DEV CORP·Filed 1991·Granted Dec 15, 1992·136 cites·31 claims
- 0295US4911408ASeat assembly for ball valvesKEMP DEV CORP·Filed 1989·Granted Mar 27, 1990·78 cites·19 claims
- 0395US4222429AFoundry process including heat treating of produced castings in formation sandFOUNDRY MANAGEMENT INC·Filed 1979·Granted Sep 16, 1980·60 cites·28 claims
- 0491US4249889AMethod and apparatus for preheating, positioning and holding objectsKEMP WILLARD E·Filed 1979·Granted Feb 10, 1981·22 cites·32 claims
- 0590US4911196AInline check valveKEMP DEV CORP·Filed 1989·Granted Mar 27, 1990·58 cites·7 claims
- 0683US6427711B1Inline check valveKEMP DEV CORP·Filed 2000·Granted Aug 6, 2002·26 cites·6 claims
- 0783US4940208ABall valveKEMP DEV CORP·Filed 1989·Granted Jul 10, 1990·38 cites·8 claims
- 0882US4379725AProcess for hot isostatic pressing of a metal workpieceKEMP WILLARD E·Filed 1982·Granted Apr 12, 1983·19 cites·13 claims
- 0981US5399207AProcess for surface hardening of refractory metal workpiecesFIKE CORP·Filed 1993·Granted Mar 21, 1995·40 cites·17 claims
- 1080USD292820SGate valveKEMP WILLARD E·Filed 1983·Granted Nov 17, 1987·16 cites·1 claims
- 1179US5316594AProcess for surface hardening of refractory metal workpiecesFIKE CORP·Filed 1991·Granted May 31, 1994·36 cites·11 claims
- 1277US4899980ABall valveKEMP DEV CORP·Filed 1989·Granted Feb 13, 1990·31 cites·9 claims
- 1375US4410373AProcess for heat treatment of a metal workpieceKEMP WILLARD E·Filed 1981·Granted Oct 18, 1983·16 cites·2 claims
- 1473US5324009AApparatus for surface hardening of refractory metal workpiecesKEMP WILLARD E·Filed 1992·Granted Jun 28, 1994·16 cites·16 claims
- 1569US5170989ASealing assembly for valve memberFIKE CORP·Filed 1992·Granted Dec 15, 1992·29 cites·17 claims
- 1665US6773521B2Apparatus and process for treating a particulate material within a rotating retortKEMP DEV CORP·Filed 2002·Granted Aug 10, 2004·3 cites·4 claims
- 1764US5127628AMeans for rotating ball valves between open and closed positionsFIKE CORP·Filed 1991·Granted Jul 7, 1992·25 cites·6 claims
- 1864US4072126AVisual indicator for safety systemsACF IND INC·Filed 1976·Granted Feb 7, 1978·19 cites·11 claims
- 1963US5435337AInline control valve for controlling fluid flowFIKE CORP·Filed 1993·Granted Jul 25, 1995·22 cites·7 claims
- 2062US5378331AApparatus and method for electropolishing metal workpiecesKEMP DEV CORP·Filed 1993·Granted Jan 3, 1995·14 cites·8 claims
- 2160US4318437AMetal casting systemKEMP WILLARD E·Filed 1980·Granted Mar 9, 1982·16 cites·40 claims
- 2257USD292935SGate valveKEMP WILLARD E·Filed 1983·Granted Nov 24, 1987·6 cites·1 claims
- 2354US6425570B1Ball valve having retractable sealing memberKEMP DEV CORP·Filed 2000·Granted Jul 30, 2002·6 cites·7 claims
- 2454US5766544AProcess for fluidizing particulate material within a rotatable retortKEMP DEV CORP·Filed 1996·Granted Jun 16, 1998·17 cites·10 claims
- 2554USD292933SGate valveKEMP WILLARD E·Filed 1983·Granted Nov 24, 1987·5 cites·1 claims
- 2654US4160460AFire-safe valve structureACF IND INC·Filed 1977·Granted Jul 10, 1979·13 cites·16 claims
- 2753US4588164AThrough conduit gate valveKEMP WILLARD E·Filed 1983·Granted May 13, 1986·15 cites·30 claims
- 2852US5958156AProcess for treating a particulate material within a rotating retortKEMP DEV CORP·Filed 1998·Granted Sep 28, 1999·11 cites·9 claims
- 2952US4919391Aflanged connection for valvesKEMP DEV CORP·Filed 1988·Granted Apr 24, 1990·16 cites·12 claims
- 3049USD291723SGate valveKEMP WILLARD E·Filed 1983·Granted Sep 1, 1987·4 cites·1 claims
- 3149US2007252102A1Ball valve having annular springs seatsKEMP WILLARD E·Filed 2007·Application pending·0 cites
- 3248US5303904AMethod and apparatus for controlling heat transfer between a container and workpiecesFIKE CORP·Filed 1992·Granted Apr 19, 1994·12 cites·10 claims
- 3347US5759483AApparatus for treating a particulate material within a rotating retortKEMP DEV CORP·Filed 1996·Granted Jun 2, 1998·12 cites·10 claims
- 3445US4066240ASelf compensating seat for a spherical plug valveACF IND INC·Filed 1976·Granted Jan 3, 1978·11 cites·10 claims
- 3545US2005173665A1Ball valve having annular spring seatsFiled 2005·Application pending·0 cites
- 3643US5000492AFlanged connection for flow line membersKEMP DEV CORP·Filed 1990·Granted Mar 19, 1991·9 cites·8 claims
- 3743USD296922SGate valveKEMP WILLARD E·Filed 1985·Granted Jul 26, 1988·3 cites·1 claims
- 3842US5407498AMechanically fluidized retort and method for treating particles thereinKEMP DEV CORP·Filed 1993·Granted Apr 18, 1995·8 cites·9 claims
- 3941USD291724SGate valveKEMP WILLARD E·Filed 1983·Granted Sep 1, 1987·2 cites·1 claims
- 4040US4530488AThrough conduit gate valve with double expanding gate assemblyKEMP WILLARD E·Filed 1983·Granted Jul 23, 1985·8 cites·7 claims
- 4134US6379610B1Apparatus and process for treating a particulate material within a rotating retortFiled 1999·Granted Apr 30, 2002·3 cites·17 claims
- 4233US4178665AMethod of making a fabricated gate valveACF IND INC·Filed 1978·Granted Dec 18, 1979·4 cites·3 claims
- 4332USD296921SGate valveKEMP WILLARD E·Filed 1985·Granted Jul 26, 1988·0 cites·1 claims
- 4432US4111396AFabricated gate valve structureACF IND INC·Filed 1977·Granted Sep 5, 1978·4 cites·5 claims
- 4531US4193577AExpanding gate valve with axially flexed spring plateACF IND INC·Filed 1978·Granted Mar 18, 1980·2 cites·10 claims
Join the waitlist — get patent alerts
Get an alert when Willard E. Kemp files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →