Willi Dunwald
26Patents
8h-index
16Co-inventors
68Inventor score
Filing activity: Jan 28, 1975 → Jun 7, 1991
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4465839A | Process for the production of hydantoins | Chemistry; Metallurgy | 23 | Expired |
| US4096291A | Melt coating composition and coating process | Emerging Cross-Sectional Technologies | 23 | Expired |
| US4005056A | Process for the preparation of polyhydantoins and polyparanic acids | Chemistry; Metallurgy | 13 | Expired |
| US4088637A | Process for the production of polycondensates containing imide groups | Chemistry; Metallurgy | 11 | Expired |
| US4293669A | Heat-resistant cross-linked polymers and the use thereof as binders | Emerging Cross-Sectional Technologies | 9 | Expired |
| US4565843A | Lacquer solutions based on hydantoin group-containing polymers | Emerging Cross-Sectional Technologies | 8 | Expired |
| US4954577A | Lacquer binders, coating compositions and wire enamels based on polyamideimides and isocyanates carrying carbodiimide and/or uretone imine groups | Electricity | 8 | Expired |
| US4444845A | "Process for the production of coatings and the use of N,N',N""-tris-(2-hydroxyethyl)-isocyanurate as additives for polyurethane based wire lacquers" | Emerging Cross-Sectional Technologies | 8 | Expired |
| US4124568A | Polycondensates | Emerging Cross-Sectional Technologies | 7 | Expired |
| US4100144A | Process for the preparation of oligourethanes | Chemistry; Metallurgy | 6 | Expired |
| US5126479A | Process for the production of blocked polyisocyanates containing carbodiimide groups, the polyisocyanates obtainable by this process and their use for the production of plastics | Electricity | 5 | Expired |
| US4246393A | Process for the preparation of poly(thio)hydantoins | Chemistry; Metallurgy | 5 | Expired |
| US4546162A | Polyamidoimides prepared from trimelitic acid anhydride, isocyanates and either lactams or polyamides using a mixture of diisocyanatodiphenylmethane and tolylene diisocyanates | Emerging Cross-Sectional Technologies | 5 | Expired |
| US4281095A | Coating compositions obtained by reacting amino carboxylic acids derivatives with polyisocyanates and compounds containing carboxylic groups to produce polymers containing hydantoin rings and amide groups | Chemistry; Metallurgy | 4 | Expired |
| US4517353A | Process for preparation of hydantoin esters through a masked polyisocyanate-carbodiimide route | Chemistry; Metallurgy | 4 | Expired |
| US4472567A | Process for the production of polyamide imides | Chemistry; Metallurgy | 4 | Expired |
| US5126422A | Coating compositions and coated heat-resistant substrates prepared therefrom | Emerging Cross-Sectional Technologies | 3 | Expired |
| US4853261A | Process for the preparation of coatings with hydantoin structures by the reaction of compounds containing carbodiimide groups with unsaturated carboxylic acids | Chemistry; Metallurgy | 3 | Expired |
| US4269750A | Process for the preparation of polymers containing hydantoin groups | Chemistry; Metallurgy | 3 | Expired |
| US4448942A | Process for the production of hydantoins | Emerging Cross-Sectional Technologies | 2 | Expired |
| US4187365A | Process for the production of polycondensate containing cyclic imide groups | Chemistry; Metallurgy | 2 | Expired |
| US4298515A | Process for the preparation of polymers containing hydantoin groups | Chemistry; Metallurgy | 2 | Expired |
| US4289868A | Polyhydantoins from unsaturated carboxylic acids and polyiso(thio)cyanates | Chemistry; Metallurgy | 1 | Expired |
| US4212982A | Polyisocyanates with at least one hydantoin or thiohydantoin ring substituted by carboxylic acid amide groups | Emerging Cross-Sectional Technologies | 0 | Expired |
| US4465840A | Process for the production of (thio) hydantoins | Chemistry; Metallurgy | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.