David J. Keller
62Patents
17h-index
39Co-inventors
84Inventor score
Filing activity: Dec 1, 1981 → Jun 21, 2018
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4515769A | Encapsulated flavorant material, method for its preparation, and food and other compositions incorporating same | Human Necessities | 164 | Expired |
| US4386106A | Process for preparing a time delayed release flavorant and an improved flavored chewing gum composition | Human Necessities | 150 | Expired |
| US5346586A | Method for selectively etching polysilicon to gate oxide using an insitu ozone photoresist strip | Electricity | 51 | Expired |
| US5256245A | Use of a clean up step to form more vertical profiles of polycrystalline silicon sidewalls during the manufacture of a semiconductor device | Emerging Cross-Sectional Technologies | 45 | Expired |
| US5460273A | Apparatus for the automated processing of bulk mail having varied characteristics | Emerging Cross-Sectional Technologies | 43 | Expired |
| US5644153A | Method for etching nitride features in integrated circuit construction | Electricity | 38 | Expired |
| US4851243A | Calcium fortified aseptically packaged milk | Human Necessities | 31 | Expired |
| US5858865A | Method of forming contact plugs | Emerging Cross-Sectional Technologies | 30 | Expired |
| US5620615A | Method of etching or removing W and WSi.sub.x films | Emerging Cross-Sectional Technologies | 27 | Expired |
| US5021251A | Process for preserving lemon juice utilizating a non-sulfite preservative | Human Necessities | 24 | Expired |
| US5968844A | Method for etching nitride features in integrated circuit construction | Electricity | 20 | Expired |
| US4888194A | Shelf-stable aseptic dairy product | Human Necessities | 20 | Expired |
| US5651445A | Apparatus for the automated processing of bulk mail having varied characteristics | Emerging Cross-Sectional Technologies | 18 | Expired |
| US5492597A | Method of etching WSi.sub.x films | Electricity | 18 | Expired |
| US5652170A | Method for etching sloped contact openings in polysilicon | Emerging Cross-Sectional Technologies | 17 | Expired |
| US5651856A | Selective etch process | Electricity | 17 | Expired |
| US5784966A | Stabilized lightweight equipment transport system | Mechanical Engineering; Lighting; Heating | 17 | Expired |
| US4748028A | Aseptic fluid coffee whitener and process for preparing same | Human Necessities | 16 | Expired |
| US5974978A | Stabilized lightweight equipment transport system | Mechanical Engineering; Lighting; Heating | 14 | Expired |
| US6060783A | Self-aligned contact plugs | Emerging Cross-Sectional Technologies | 13 | Expired |
| US5387312A | High selective nitride etch | Electricity | 13 | Expired |
| US8568743B2 | Inactivated bacterial cell formulation | Human Necessities | 13 | Active |
| US8568744B2 | Inactivated bacterial cell formulation | Human Necessities | 12 | Active |
| US9192659B2 | Inactivated bacterial cell formulation | Human Necessities | 11 | Active |
| US9446111B2 | Inactivated bacterial cell formulation | Human Necessities | 11 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.