Hellmuth Spes
6Patents
2h-index
10Co-inventors
37Inventor score
Filing activity: Apr 10, 1975 → Nov 20, 1978
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4107002A | Process for the purification of crude acetic anhydride | Emerging Cross-Sectional Technologies | 18 | Expired |
| US4129596A | Process for the continuous preparation of acetoacetamides | Chemistry; Metallurgy | 4 | Expired |
| US4201715A | Process for the anilidization of carboxylic acid esters | Chemistry; Metallurgy | 2 | Expired |
| US3997550A | Method for the purification of 2-aminothiazole | Chemistry; Metallurgy | 0 | Expired |
| US4094902A | Process for the manufacture of phosphoric acid-tris-(dimethylamide) | Chemistry; Metallurgy | 0 | Expired |
| US4098819A | Process for the production of phosphoric acid-dimethylamide-dichloride or phosphoric acid-bis-(dimethylamide)-chloride | Chemistry; Metallurgy | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.