Engelbert Pechhold
30Patents
11h-index
4Co-inventors
68Inventor score
Filing activity: Feb 21, 1975 → Jun 21, 1999
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4120850A | Polyether urethane polymers prepared from a copolymer of tetrahydrofuran and ethylene oxide | Chemistry; Metallurgy | 38 | Expired |
| US4958039A | Modified fluorocarbonylimino biurets | Emerging Cross-Sectional Technologies | 33 | Expired |
| US5460887A | Stain-resistant polyamide substrates | Emerging Cross-Sectional Technologies | 25 | Expired |
| US5707708A | Maleic anhydride/olefin polymer stain-resists | Emerging Cross-Sectional Technologies | 23 | Expired |
| US5654068A | Stain resists for polyamide substrates | Emerging Cross-Sectional Technologies | 19 | Expired |
| US5834088A | Maleic anhydride/olefin polymer stain-resists | Emerging Cross-Sectional Technologies | 19 | Expired |
| US5346726A | Maleic anhydride/vinyl or allyl ether polymer stain-resists | Textiles; Paper | 15 | Expired |
| US5356689A | Process providing durable stain-resistance using methacrylic acid polymers | Emerging Cross-Sectional Technologies | 13 | Expired |
| US5708087A | Carboxylic acid-containing polymer/resole stain-resists | Textiles; Paper | 13 | Expired |
| US5358769A | Process providing durable stain-resistance by use of maleic anhydride polymers | Emerging Cross-Sectional Technologies | 13 | Expired |
| US4224432A | Polyurethanes prepared with tetrahydrofuran-alkylene oxide polymerizates having low oligomeric cyclic ether content | Chemistry; Metallurgy | 12 | Expired |
| US4251654A | Copolyether glycols of tetrahydrofuran and alkylene oxides having low oligomeric cyclic ether content | Chemistry; Metallurgy | 11 | Expired |
| US3981766A | Method of controlling fungi and bacteria in paper products | Emerging Cross-Sectional Technologies | 10 | Expired |
| US4383100A | Polyurethanes from oligomeric formal diols of THF copolymer glycols | Chemistry; Metallurgy | 10 | Expired |
| US6238792A | Fluorine-containing maleic acid terpolymer soil and stain resists | Emerging Cross-Sectional Technologies | 10 | Expired |
| US5107033A | Perfluoroalkyl polyether glycols and their use | Chemistry; Metallurgy | 10 | Expired |
| US5770656A | Partial fluoroesters or thioesters of maleic acid polymers and their use as soil and stain resists | Emerging Cross-Sectional Technologies | 10 | Expired |
| US5670246A | Treatment of polyamide materials with partial fluoroesters or fluorothioesters of maleic acid polymers and sulfonated aromatic condensates | Emerging Cross-Sectional Technologies | 9 | Expired |
| US5447755A | Substrates treated with bis(hydroxyphenyl) sulfone stain-resists | Emerging Cross-Sectional Technologies | 9 | Expired |
| US5260406A | Phenolic stain-resists using mercaptocarboxylic acid | Emerging Cross-Sectional Technologies | 8 | Expired |
| US5460891A | Substrates treated with bis(hydroxyphenyl)sulfone stain-resists | Emerging Cross-Sectional Technologies | 8 | Expired |
| US5712348A | Maleic acid copolymers with fluorinated thioether end-cap | Emerging Cross-Sectional Technologies | 6 | Expired |
| US4355119A | Oligomeric formal diols of poly(tetramethylene ether) glycol and polyurethanes prepared therefrom | Chemistry; Metallurgy | 4 | Expired |
| US5750445A | Treatment of polyamide materials with partial fluoroesters or fluorothioesters of maleic acid polymers and sulfonated aromatic condensates | Emerging Cross-Sectional Technologies | 4 | Expired |
| US5824372A | Maleic acid copolymers with fluorinated thioether end cap | Emerging Cross-Sectional Technologies | 4 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.