Hans Schaefer
10Patents
5h-index
25Co-inventors
66Inventor score
Filing activity: May 17, 1973 → Sep 25, 2000
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4378995A | Iron blue pigment, process for making the same and use | Chemistry; Metallurgy | 40 | Expired |
| US4390532A | Topical combinations of an .alpha.-estradiol with a methyl xanthine | Human Necessities | 19 | Expired |
| US4295908A | Method and apparatus for heat sealing a plurality of sets of continuous plastic strips together by radio frequency energy | Emerging Cross-Sectional Technologies | 15 | Expired |
| US4366138A | Carbon black useful for pigment for black lacquers | Chemistry; Metallurgy | 13 | Expired |
| US3960766A | Catalyst for the production of pyridine and 3-methylpyridine | Chemistry; Metallurgy | 7 | Expired |
| US4853190A | Process & apparatus for the production of hydrogen cyanide | Mechanical Engineering; Lighting; Heating | 4 | Expired |
| US4594234A | Process and apparatus for the production of hydrogen cyanide | Mechanical Engineering; Lighting; Heating | 3 | Expired |
| US4116811A | Method of separating active hydrogen compounds from heterogeneous mixtures also containing compounds which do not contain active hydrogens | Chemistry; Metallurgy | 3 | Expired |
| US6524434B1 | Tubular device in a bagging machine | Emerging Cross-Sectional Technologies | 2 | Expired |
| US4368075A | Iron blue pigment, process for making the same and use | Chemistry; Metallurgy | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.