Winfried Kirchhoff
4Patents
4h-index
8Co-inventors
43Inventor score
Filing activity: Nov 2, 1977 → Jun 14, 1989
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4756771A | Colorless sealing layers for anodized aluminum surfaces | Chemistry; Metallurgy | 99 | Expired |
| US4121980A | Method of sealing oxidized aluminum surfaces with aqueous solutions of polycarboxylic acids | Chemistry; Metallurgy | 12 | Expired |
| US4939001A | Process for sealing anodized aluminum | Chemistry; Metallurgy | 11 | Expired |
| US4445983A | Sealing anodically produced oxide layers, on aluminum | Chemistry; Metallurgy | 5 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.