Ugo Pfeiffer
14Patents
4h-index
21Co-inventors
60Inventor score
Filing activity: Mar 29, 1985 → Dec 15, 2011
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6257336A | Well cementing method using HMHPG filtrate reducer | Chemistry; Metallurgy | 26 | Expired |
| US6706112B2 | Additives based on hydroxyalkyl guar derivatives for use in mortars and mortars including them | Chemistry; Metallurgy | 12 | Expired |
| US7396924B2 | Building additives based on purified hydroxyalkyl guar | Chemistry; Metallurgy | 4 | Expired |
| US7355039B2 | Building additives based on purified hydrophobically modified hydroxyalkyl guar | Chemistry; Metallurgy | 4 | Expired |
| US4788300A | Substituted butanamido acetate compounds for the preparation of pyrrolidone derivatives | Emerging Cross-Sectional Technologies | 2 | Expired |
| US4797496A | Process for the preparation of pyrrolidone derivatives | Chemistry; Metallurgy | 2 | Expired |
| US4629797A | Process for the preparation of pyrrolidone derivatives | Emerging Cross-Sectional Technologies | 2 | Expired |
| US8765845B2 | Hydraulic binder composition | Chemistry; Metallurgy | 2 | Active |
| US4824861A | Pyrrolidone derivatives and memory enhancement use thereof | Human Necessities | 1 | Expired |
| US4868313A | A process for making pyrrolidone derivatives | Human Necessities | 1 | Expired |
| US4719222A | Pharmacologically active 5-oxo-1-imidazolidine acetamide compounds | Human Necessities | 1 | Expired |
| US4703054A | Nootropic imidazolidinones | Human Necessities | 0 | Expired |
| US8017560B2 | Fast dissolving hydroxyalkyl guar derivatives | Chemistry; Metallurgy | 0 | Active |
| US8580952B2 | Glyoxal free purified cationic polygalactomannan | Chemistry; Metallurgy | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.