Douglas Hillshafer
9Patents
4h-index
12Co-inventors
54Inventor score
Filing activity: Nov 26, 1982 → Dec 27, 2023
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4687788A | Dimensionally stable urethane elastomers | Chemistry; Metallurgy | 23 | Expired |
| US4868223A | Use of amine initiated butylene oxide polyols in polyurethane products | Emerging Cross-Sectional Technologies | 13 | Expired |
| US6569352B1 | Phthalic anhydride based polyester-ether polyols and urethane prepolymers produced therefrom | Chemistry; Metallurgy | 11 | Expired |
| US4478941A | Method for determining component ratios employed to prepare polymers | Emerging Cross-Sectional Technologies | 7 | Expired |
| US4814411A | Increased reactivity of isocyanate terminated polyether prepolymers with metal halide salt complexes of methylenedianiline | Chemistry; Metallurgy | 3 | Expired |
| US11898096B2 | Polyester diverting agents for low-temperature oil wells | Chemistry; Metallurgy | 1 | Active |
| US9284518B2 | Multi-arm hydrophilic urethane polymers, methods of making them, and compositions and processes employing them | Chemistry; Metallurgy | 0 | Active |
| US12291673B2 | Polyester diverting agents for low-temperature oil wells | Chemistry; Metallurgy | 0 | Active |
| US9487467B2 | Method for producing ο-phthalate polyester polyols with low cyclic ester content | Chemistry; Metallurgy | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.