Carl Freudenberg KG
Carl FreudActive Patents
0
Total Holdings
11
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US4646733A | Endotracheal tube for a high-frequency respirator | Expired / Lapsed | 1985-09-30 | 1987-03-03 | 25 | Details |
| US4478620A | Air filter | Expired / Lapsed | 1982-12-06 | 1984-10-23 | 7 | Details |
| US4434204A | Spun-bonded fabric of partially drawn polypropylene with a … | Expired / Lapsed | 1982-09-10 | 1984-02-28 | 7 | Details |
| US4320201A | Method for making collagen sponge for medical and cosmetic … | Expired / Lapsed | 1980-09-02 | 1982-03-16 | 11 | Details |
| US4080185A | Composite filter set for gas flow ducts | Expired / Lapsed | 1976-09-16 | 1978-03-21 | 2 | Details |
| US3823212A | Process for the production of collagen fiber fabrics in the… | Expired / Lapsed | 1971-05-28 | 1974-07-09 | 0 | Details |
| US3546004A | Method of producing water vapor and air permeable films of … | Expired / Lapsed | 1966-02-24 | 1970-12-08 | 0 | Details |
| US3509009A | Non-woven fabric | Expired / Lapsed | 1967-02-06 | 1970-04-28 | 0 | Details |
| US2256034A | Artificial leather substitute | Expired / Lapsed | 1938-02-26 | 1941-09-16 | 0 | Details |
| US2120851A | Process for the manufacture of spun goods, fabrics, and oth… | Expired / Lapsed | 1935-09-09 | 1938-06-14 | 0 | Details |
| US2105036A | Process for the manufacture of spun goods, fabrics, and oth… | Expired / Lapsed | 1935-05-03 | 1938-01-11 | 0 | Details |