Charles Sumner
28Patents
10h-index
30Co-inventors
75Inventor score
Filing activity: Oct 9, 1987 → Jun 3, 2016
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6759562B2 | Olefin plant recovery system employing a combination of catalytic distillation and fixed bed catalytic steps | Emerging Cross-Sectional Technologies | 90 | Expired |
| US5169994A | Process for the manufacture of 2,2,4,4-tetramethycyclobutanediol | Chemistry; Metallurgy | 78 | Expired |
| US5258556A | Process for the manufacture of 2,2,4,4-tetramethylcyclobutanediol | Chemistry; Metallurgy | 75 | Expired |
| US5679241A | Olefin plant recovery system employing catalytic distillation | Chemistry; Metallurgy | 66 | Expired |
| US5979177A | Ethylene plant refrigeration system | Emerging Cross-Sectional Technologies | 20 | Expired |
| US7223895B2 | Production of propylene from steam cracking of hydrocarbons, particularly ethane | Emerging Cross-Sectional Technologies | 20 | Expired |
| US5925799A | Catalytic distillation and hydrogenation of heavy unsaturates in an olefins plant | Emerging Cross-Sectional Technologies | 18 | Expired |
| US4902827A | Process for the preparation of adipic acid | Chemistry; Metallurgy | 13 | Expired |
| US7045669B2 | Dual pressure catalytic distillation hydrogenation column system for the front end of an ethylene plant | Emerging Cross-Sectional Technologies | 11 | Expired |
| US6705113B2 | Olefin plant refrigeration system | Emerging Cross-Sectional Technologies | 10 | Expired |
| US6706898B2 | Methods for separating a tocopherol from a tocopherol-containing mixture | Chemistry; Metallurgy | 8 | Expired |
| US5041616A | Preparation of aryl ketones | Chemistry; Metallurgy | 8 | Expired |
| US7787598B2 | Method and system for automatic generation and testing of voice applications | Electricity | 8 | Active |
| US5068460A | Process for preparation of resorcinol | Chemistry; Metallurgy | 7 | Expired |
| US5780683A | Cyclohexane oxidation | Chemistry; Metallurgy | 7 | Expired |
| US7525007B2 | Production of propylene from steam cracking of hydrocarbons, particularly ethane | Emerging Cross-Sectional Technologies | 5 | Active |
| US4804777A | Process for the preparation of aryloxyacetic acid | Chemistry; Metallurgy | 5 | Expired |
| US5231218A | Isomerization of dimethylcyclohexanedicarboxylate | Chemistry; Metallurgy | 5 | Expired |
| US8230021B2 | Systems and methods for creating programmable reply functions for an instant messaging client | Physics | 3 | Active |
| US4935540A | Process for the preparation of aryloxyacetic acid | Chemistry; Metallurgy | 3 | Expired |
| US4791224A | Process for preparation of an oxyacetic acid/hydroxyethyl ether compound | Chemistry; Metallurgy | 2 | Expired |
| US6963840B2 | Method for incorporating multiple cursors in a speech recognition system | Physics | 2 | Expired |
| US9909804B2 | Method of cooling using extended binary refrigeration system | Mechanical Engineering; Lighting; Heating | 2 | Active |
| US4761497A | Process for preparing 2-naphthanoic acids and esters thereof | Emerging Cross-Sectional Technologies | 0 | Expired |
| US4786748A | Processes for preparing aklylene and dialkyl ketals and alkyl alpha-enol ethers of alpha-acetyl cinnamic acids or esters thereof | Chemistry; Metallurgy | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.