Ernst Pfleiderer
32Patents
10h-index
19Co-inventors
72Inventor score
Filing activity: Jan 9, 1974 → Jan 11, 1996
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4220724A | Method for treating raw materials containing collagen | Chemistry; Metallurgy | 25 | Expired |
| US3986926A | Method for preparing tannable pelts from animal skins and hides | Emerging Cross-Sectional Technologies | 23 | Expired |
| US4943530A | Liquid enzyme preparations | Chemistry; Metallurgy | 18 | Expired |
| US4314800A | Method for treating pelts and leather | Chemistry; Metallurgy | 18 | Expired |
| US4293647A | Method of dissolving collagen-containing tissues | Emerging Cross-Sectional Technologies | 15 | Expired |
| US4220723A | Enzymatic treatment of proteinaceous animal waste products | Human Necessities | 15 | Expired |
| US4179333A | Method for making water-soluble elastin hydrolyzates | Human Necessities | 15 | Expired |
| US4636222A | Enzymatic unhairing method | Chemistry; Metallurgy | 14 | Expired |
| US3939040A | Enzymatic bating method | Chemistry; Metallurgy | 14 | Expired |
| US4294087A | Enzymatic method for hair recovery with concurrent opening of hide structure | Chemistry; Metallurgy | 12 | Expired |
| US3966551A | Method for preparing tannable pelts from animal skins and hides | Chemistry; Metallurgy | 10 | Expired |
| US5102422A | Methods for leather processing including liquid enzyme formulation | Chemistry; Metallurgy | 10 | Expired |
| US4960428A | Method for liming skins and hides | Chemistry; Metallurgy | 8 | Expired |
| US4484924A | Process for producing unhaired, storable hides and skins | Chemistry; Metallurgy | 7 | Expired |
| US5295583A | Process for cleaning short mineral fibers | Performing Operations; Transporting | 7 | Expired |
| US4436624A | CRT Method of converting and separating substances contained, dissolved or dissolvable in a carrier liquid | Emerging Cross-Sectional Technologies | 6 | Expired |
| US4443221A | Tanning method | Chemistry; Metallurgy | 6 | Expired |
| US4968621A | Method for the wet degreasing of hide and skin stock | Chemistry; Metallurgy | 5 | Expired |
| US4273876A | Enzymatic bating method | Chemistry; Metallurgy | 5 | Expired |
| US4278432A | Soaking method | Chemistry; Metallurgy | 5 | Expired |
| US4344762A | Soaking method | Chemistry; Metallurgy | 5 | Expired |
| US5089414A | Enzymatic soaking method | Chemistry; Metallurgy | 5 | Expired |
| US4210721A | Method for dissolving collagen-containing skin tissues | Emerging Cross-Sectional Technologies | 4 | Expired |
| US5792265A | Device and process for producing reinforcing layers on cylinder running surfaces of internal combustion engines and the like | Chemistry; Metallurgy | 4 | Expired |
| US4961750A | Acrylate tanning agent | Chemistry; Metallurgy | 4 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.