Josef Ritz
27Patents
9h-index
38Co-inventors
71Inventor score
Filing activity: Dec 3, 1984 → Sep 5, 1996
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5120699A | Platinum-on-graphite catalysts and the use thereof | Performing Operations; Transporting | 24 | Expired |
| US5496941A | Process for continuous purification of crude caprolactam prepared from 6-aminocapronitrile | Emerging Cross-Sectional Technologies | 21 | Expired |
| US4778669A | Preparation of aqueous solutions of free hydroxylamine | Chemistry; Metallurgy | 18 | Expired |
| US5359062A | Recovery of caprolactam from polycaprolactam | Chemistry; Metallurgy | 18 | Expired |
| US5693793A | Preparation of caprolactam from 6-aminocapronitrile | Chemistry; Metallurgy | 17 | Expired |
| US4889704A | Preparation of hydroxylammonium salts | Chemistry; Metallurgy | 13 | Expired |
| US5536831A | Obtaining caprolactam by cleavage of molten polycaprolactam | Chemistry; Metallurgy | 11 | Expired |
| US5032684A | Continuous purification of caprolactam | Chemistry; Metallurgy | 11 | Expired |
| US4629613A | Stabilized solutions of hydroxylamine or its salts in water or alcohols, and their preparation | Chemistry; Metallurgy | 9 | Expired |
| US5700358A | Recovery of caprolactam from oligomers and/or polymers of caprolactam | Chemistry; Metallurgy | 9 | Expired |
| US4882430A | Recovery of caprolactam from caprolactam distillation low boilers or high boilers or mixtures thereof | Chemistry; Metallurgy | 9 | Expired |
| US5360905A | Recovery of caprolactam from oligomers and/or polymers of caprolactam | Chemistry; Metallurgy | 9 | Expired |
| US4634584A | Stabilized solutions of hydroxylamine or its salts in water or alcohols, and their preparation | Chemistry; Metallurgy | 8 | Expired |
| US5458740A | Process for the purification of crude caprolactam | Emerging Cross-Sectional Technologies | 7 | Expired |
| US4576804A | Stabilized solutions of hydroxylamine or its salts | Chemistry; Metallurgy | 6 | Expired |
| US5441607A | Recovery of caprolactam from distillation residues obtained in the purification of caprolactam | Chemistry; Metallurgy | 6 | Expired |
| US5155081A | Platinum-on-graphite catalysts | Performing Operations; Transporting | 5 | Expired |
| US4551318A | Stabilized solutions of hydroxylamine or its salts in water or alcohols, and their preparation | Chemistry; Metallurgy | 5 | Expired |
| US5236685A | Preparation of hydroxylammonium salts | Performing Operations; Transporting | 5 | Expired |
| US4725360A | Working up wastewaters containing hydroxylamine or its salts | Performing Operations; Transporting | 4 | Expired |
| US5264571A | Preparation of caprolactam by Beckmann rearrangement of cyclohexanone oxime | Chemistry; Metallurgy | 4 | Expired |
| US4814511A | Working up cyclohexyl hydroperoxide containing reaction mixtures | Chemistry; Metallurgy | 3 | Expired |
| US4601800A | Preparation of aqueous solutions of hydroxylammonium carbonate | Performing Operations; Transporting | 1 | Expired |
| US4737354A | Preparation of hydroxylamine-O-sulfonic acid | Chemistry; Metallurgy | 1 | Expired |
| US4931592A | Storability of molten cyclohexanone oxime | Chemistry; Metallurgy | 1 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.