Willard E. Kemp
43Patents
13h-index
2Co-inventors
71Inventor score
Filing activity: Jun 1, 1976 → Apr 5, 2002
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5170659A | Apparatus and method for detecting fluid leakage | Emerging Cross-Sectional Technologies | 71 | Expired |
| US4911408A | Seat assembly for ball valves | Mechanical Engineering; Lighting; Heating | 43 | Expired |
| US4911196A | Inline check valve | Emerging Cross-Sectional Technologies | 30 | Expired |
| US4222429A | Foundry process including heat treating of produced castings in formation sand | Chemistry; Metallurgy | 25 | Expired |
| US5399207A | Process for surface hardening of refractory metal workpieces | Chemistry; Metallurgy | 21 | Expired |
| US5316594A | Process for surface hardening of refractory metal workpieces | Chemistry; Metallurgy | 21 | Expired |
| US4940208A | Ball valve | Mechanical Engineering; Lighting; Heating | 20 | Expired |
| US4249889A | Method and apparatus for preheating, positioning and holding objects | Mechanical Engineering; Lighting; Heating | 15 | Expired |
| USD292820S | Gate valve | General | 15 | Expired |
| US4899980A | Ball valve | Mechanical Engineering; Lighting; Heating | 14 | Expired |
| US5766544A | Process for fluidizing particulate material within a rotatable retort | Emerging Cross-Sectional Technologies | 14 | Expired |
| US5435337A | Inline control valve for controlling fluid flow | Emerging Cross-Sectional Technologies | 14 | Expired |
| US5170989A | Sealing assembly for valve member | Mechanical Engineering; Lighting; Heating | 14 | Expired |
| US5127628A | Means for rotating ball valves between open and closed positions | Mechanical Engineering; Lighting; Heating | 13 | Expired |
| US4072126A | Visual indicator for safety systems | Mechanical Engineering; Lighting; Heating | 13 | Expired |
| US4318437A | Metal casting system | Performing Operations; Transporting | 12 | Expired |
| US4379725A | Process for hot isostatic pressing of a metal workpiece | Chemistry; Metallurgy | 12 | Expired |
| US4919391A | flanged connection for valves | Emerging Cross-Sectional Technologies | 11 | Expired |
| US6427711B1 | Inline check valve | Emerging Cross-Sectional Technologies | 10 | Expired |
| US5303904A | Method and apparatus for controlling heat transfer between a container and workpieces | Chemistry; Metallurgy | 9 | Expired |
| US4588164A | Through conduit gate valve | Mechanical Engineering; Lighting; Heating | 9 | Expired |
| US4410373A | Process for heat treatment of a metal workpiece | Chemistry; Metallurgy | 9 | Expired |
| US5378331A | Apparatus and method for electropolishing metal workpieces | Chemistry; Metallurgy | 8 | Expired |
| US5324009A | Apparatus for surface hardening of refractory metal workpieces | Chemistry; Metallurgy | 8 | Expired |
| US5407498A | Mechanically fluidized retort and method for treating particles therein | Chemistry; Metallurgy | 7 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.