Hans-Rainer Zerfass
17Patents
7h-index
26Co-inventors
66Inventor score
Filing activity: Aug 30, 1983 → Apr 10, 2014
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4781389A | Flat sealing gasket having graphite-filled armor | Mechanical Engineering; Lighting; Heating | 35 | Expired |
| US4748075A | Flat sealing material made of a soft substance, particularly for the production of gaskets that are to be subjected to high stresses | Emerging Cross-Sectional Technologies | 22 | Expired |
| US4600201A | Impregnated flat sealing gasket and method of making the same | Emerging Cross-Sectional Technologies | 19 | Expired |
| US6343795B1 | Flat gasket | Mechanical Engineering; Lighting; Heating | 18 | Expired |
| US4635948A | Release coating for gaskets and manufacturing method | Emerging Cross-Sectional Technologies | 17 | Expired |
| US4741965A | Impregnated soft substance gasket | Emerging Cross-Sectional Technologies | 14 | Expired |
| US4681800A | Impregnated, soft, flat gasket and manufacturing method | Emerging Cross-Sectional Technologies | 12 | Expired |
| US6708982B2 | Method for applying a projection to a metal layer of a cylinder-head gasket, and cylinder-head gasket | Emerging Cross-Sectional Technologies | 7 | Expired |
| US7086651B2 | Method for applying a projection to a metal layer of a cylinder-head gasket, and cylinder-head gasket | Emerging Cross-Sectional Technologies | 6 | Expired |
| US7422818B2 | Seal construction for a fuel cell electrolyser and process for making a fuel cell with same | Emerging Cross-Sectional Technologies | 5 | Expired |
| US5306553A | Impregnated flat gasket and method of producing the gasket | Emerging Cross-Sectional Technologies | 3 | Expired |
| US8663864B2 | Sealing assembly for a fuel cell stack | Emerging Cross-Sectional Technologies | 1 | Active |
| US6949306B2 | High temperature stable adhesive | Emerging Cross-Sectional Technologies | 1 | Expired |
| US7550018B2 | Method of producing a sealing arrangement for a fuel cell stack and a sealing arrangement for a fuel cell stack | Emerging Cross-Sectional Technologies | 1 | Active |
| US10170775B2 | Method for producing a solder glass green seal | Emerging Cross-Sectional Technologies | 0 | Active |
| US9112193B2 | Sealing arrangement for high-temperature fuel cell stack | Emerging Cross-Sectional Technologies | 0 | Active |
| US9812716B2 | Sealing assembly for a fuel cell stack having a coated metallic sheet intermediate element | Emerging Cross-Sectional Technologies | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.