Carl Freudenberg
33Patents
0Active
33Granted
34Portfolio score
Filing activity: Jun 13, 1978 → Aug 22, 2000
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5167740A | Method of making a filter insert of nonwoven material in the form of a pleated pack | Emerging Cross-Sectional Technologies | 108 | Expired |
| US5188337A | Control valve with pressure equalization | Physics | 56 | Expired |
| USD445227S | Dusting mop pad | General | 54 | Expired |
| US4347912A | Airborne-sound-absorbing wall or ceiling paneling | Emerging Cross-Sectional Technologies | 44 | Expired |
| US4413032A | Non-woven fabric with wick action | Emerging Cross-Sectional Technologies | 38 | Expired |
| US5236204A | Bellows made of thermoplastic elastomer | Emerging Cross-Sectional Technologies | 35 | Expired |
| US5466517A | Spundbonded fabrics comprising biodegradable polycaprolactone filaments and process for its manufacture | Emerging Cross-Sectional Technologies | 32 | Expired |
| USD385978S | Flooring surface | General | 26 | Expired |
| US5279878A | Flame barrier made of nonwoven fabric | Emerging Cross-Sectional Technologies | 23 | Expired |
| USD385974S | Flooring surface | General | 21 | Expired |
| US4553763A | Seal ring having an axis parallel intermediate ring | Mechanical Engineering; Lighting; Heating | 20 | Expired |
| USD394319S | Flooring surface | General | 13 | Expired |
| USD385977S | Flooring surface | General | 12 | Expired |
| US5516123A | U-shaped sealing member for sealing a valve cover having an impact absorber | Emerging Cross-Sectional Technologies | 10 | Expired |
| US4332633A | Method for producing shoulder pad material | Emerging Cross-Sectional Technologies | 10 | Expired |
| US4242391A | Noise barrier pad and the method for the production of same | Emerging Cross-Sectional Technologies | 10 | Expired |
| US5588547A | Covering developed for infusion bottle | Emerging Cross-Sectional Technologies | 10 | Expired |
| USD440772S | Filter material | General | 9 | Expired |
| USD385975S | Flooring surface | General | 8 | Expired |
| US5316832A | Biodegradable sheet for culturing sewage denitrifiers | Emerging Cross-Sectional Technologies | 8 | Expired |
| US5704110A | Device for crimping a plastically deforming metal pole shoe around the end of a cable | Emerging Cross-Sectional Technologies | 7 | Expired |
| US6498496B1 | Device for detecting membrane leaks in a diaphragm pump | Mechanical Engineering; Lighting; Heating | 6 | Expired |
| USD399011S | Flooring surface | General | 5 | Expired |
| US4581286A | Artificial split suede leather and a process for producing same | Emerging Cross-Sectional Technologies | 5 | Expired |
| USD394320S | Flooring surface | General | 5 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.