Patent Explorer
Browse, filter, and analyze 4 patents across global jurisdictions.
| Patent Number | Title | Assignee | Status | Filing Date | Grant Date | Expires | Remaining | Claims | Actions |
|---|---|---|---|---|---|---|---|---|---|
| US4080185A | Composite filter set for gas flow ducts | Carl Freudenberg KG | Expired / Lapsed | 1976-09-16 | 1978-03-21 | 1996-09-16 | 0.0 yrs | 2 | |
| US3823212A | Process for the production of collagen fiber fabrics in the form of felt-like membranes or sponge-like layers | Carl Freudenberg KG | Expired / Lapsed | 1971-05-28 | 1974-07-09 | 1991-05-28 | 0.0 yrs | 0 | |
| US3509009A | Non-woven fabric | Carl Freudenberg KG | Expired / Lapsed | 1967-02-06 | 1970-04-28 | 1987-02-06 | 0.0 yrs | 0 | |
| US2120851A | Process for the manufacture of spun goods, fabrics, and other textiles | Carl Freudenberg KG | Expired / Lapsed | 1935-09-09 | 1938-06-14 | 1955-09-09 | 0.0 yrs | 0 |