Timothy D. Shaffer
60Patents
14h-index
71Co-inventors
87Inventor score
Filing activity: Aug 23, 1990 → Aug 10, 2020
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5506316A | Carbocationic catalysts and process for using said catalysts | Chemistry; Metallurgy | 55 | Expired |
| US7232872B2 | Polymerization processes | Chemistry; Metallurgy | 51 | Expired |
| US5350819A | Carbocationic catalysts and process for using said catalysts | Chemistry; Metallurgy | 50 | Expired |
| US7214750B2 | Polymerization processes | Chemistry; Metallurgy | 41 | Expired |
| US5763556A | Copolymers of ethylene and geminally disubstituted olefins | Emerging Cross-Sectional Technologies | 36 | Expired |
| US6194341A | Mixed transition metal catalyst systems for olefin polymerization | Emerging Cross-Sectional Technologies | 34 | Expired |
| US5580935A | Functionalized polymer and method to obtain functionalized polymer | Chemistry; Metallurgy | 28 | Expired |
| US6492473B1 | Mixed transition metal catalyst systems for olefin polymerization | Emerging Cross-Sectional Technologies | 26 | Expired |
| US5866665A | Copolymers of ethylene and germinally disubstituted olefins | Emerging Cross-Sectional Technologies | 25 | Expired |
| US5418303A | Carbocationic catalysts and process for using said catalysts | Emerging Cross-Sectional Technologies | 19 | Expired |
| US5350726A | Carbocationic catalysts and process for using said catalysts | Emerging Cross-Sectional Technologies | 18 | Expired |
| US7723447B2 | Polymerization processes | Chemistry; Metallurgy | 18 | Expired |
| US5703183A | Carbocationic catalysts and process for using said catalysts | Chemistry; Metallurgy | 16 | Expired |
| US6777584B2 | Selective coupling of terminal olefins with ethylene to manufacture linear &agr;-olefins | Chemistry; Metallurgy | 16 | Expired |
| US6008307A | Process for producing olefin polymers using cationic catalysts | Chemistry; Metallurgy | 13 | Expired |
| US6074978A | Carbocationic catalysts and process for using said catalysts | Chemistry; Metallurgy | 11 | Expired |
| US7037989B2 | Copolymers of ethylene and/or α-olefins and vicinally disubstituted olefins | Chemistry; Metallurgy | 11 | Expired |
| US7491773B2 | Halogenated polymers with new sequence distributions | Chemistry; Metallurgy | 10 | Expired |
| US5068310A | Polyphenylene ether process, catalyst and resin composition | Chemistry; Metallurgy | 10 | Expired |
| US7332554B2 | Polymers with new sequence distributions | Chemistry; Metallurgy | 10 | Expired |
| US7402636B1 | Method and apparatus for decreasing polymer deposition | Emerging Cross-Sectional Technologies | 9 | Active |
| US5403803A | Carbocationic catalyst and process for its use | Chemistry; Metallurgy | 9 | Expired |
| US8119006B2 | Ethanol stable epoxy amine based membrane for aromatics separation | Chemistry; Metallurgy | 9 | Active |
| US5250486A | Polyphenylene ether process and resin composition | Chemistry; Metallurgy | 9 | Expired |
| US7781547B2 | Reactor systems for use in polymerization processes | Emerging Cross-Sectional Technologies | 8 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.