Roy A. Johnson
97Patents
10h-index
41Co-inventors
78Inventor score
Filing activity: Nov 7, 1973 → Mar 22, 2021
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4123441A | Enlarged-hetero-ring prostacyclin analogs | Chemistry; Metallurgy | 57 | Expired |
| US5580640A | Integrated label having controlled release | Emerging Cross-Sectional Technologies | 40 | Expired |
| US4490537A | Enlarged-hetero-ring prostacyclin analogs | Chemistry; Metallurgy | 33 | Expired |
| US5556878A | .DELTA..sup.6,7 -taxols antineoplatic use and pharmaceutical compositions containing them | Emerging Cross-Sectional Technologies | 30 | Expired |
| US5405475A | Method and apparatus for continuous manufacture of printed laminated stock from uncoated web | Emerging Cross-Sectional Technologies | 24 | Expired |
| US4917826A | Cyclic hydrocarbons with an aminoalkyl sidechain | Chemistry; Metallurgy | 24 | Expired |
| US4499293A | PGI.sub.2 Salts | Chemistry; Metallurgy | 19 | Expired |
| US6602879B2 | Pyrrole-type compounds, compositions, and methods for treating cancer or viral diseases | Chemistry; Metallurgy | 13 | Expired |
| US4691606A | Web perforating apparatus | Emerging Cross-Sectional Technologies | 12 | Expired |
| US9290850B2 | Corrosion inhibiting methods | Chemistry; Metallurgy | 10 | Active |
| US5298230A | Process for the efficient catalytic reduction of nitrogen oxides | Performing Operations; Transporting | 10 | Expired |
| US5373095A | Steroid compounds | Chemistry; Metallurgy | 9 | Expired |
| US4495357A | Pyridyl-substituted-benzofurans | Chemistry; Metallurgy | 8 | Expired |
| US5360797A | Bisphosphonic acid derivatives useful as anti-arthritic agents | Chemistry; Metallurgy | 8 | Expired |
| US4735787A | Scale inhibitor for intermittent washed mist eliminators in flue gas desulfurization systems | Chemistry; Metallurgy | 8 | Expired |
| US4455427A | Pyridyl-substituted-benzofurans | Chemistry; Metallurgy | 7 | Expired |
| US4597247A | Method and apparatus for applying controlled heat to a group of articles disposed within a shrink film wrapper | Performing Operations; Transporting | 7 | Expired |
| US4452986A | Imidazolyl-substituted benzofurans | Chemistry; Metallurgy | 7 | Expired |
| US5621123A | Cyclic hydrocarbons with an aminoalkyl sidechain | Chemistry; Metallurgy | 6 | Expired |
| US5347029A | Dialkyl (dialkoxyphosphinyl)methyl phosphates as anti-inflammatory agents | Chemistry; Metallurgy | 6 | Expired |
| US4262116A | Enlarged hetero-ring prostacyclin analogs | Chemistry; Metallurgy | 6 | Expired |
| US8039244B2 | Reducing insoluble deposit formation in ethanol production | Emerging Cross-Sectional Technologies | 5 | Active |
| US4447607A | Dibenzo diazacines | Chemistry; Metallurgy | 5 | Expired |
| US4490531A | Pyridyl-substituted-benzofurans | Chemistry; Metallurgy | 5 | Expired |
| US4490549A | Enlarged-hetero-ring prostacyclin analogs | Chemistry; Metallurgy | 5 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.