Plastek Engineering
67Patents
1Active
67Granted
37Portfolio score
Filing activity: Jan 9, 1978 → Jul 12, 2012
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4405786A | Addition products of di-acetylene-terminated polyimide derivatives and an dienophile having ethylene groups | Chemistry; Metallurgy | 50 | Expired |
| US4402878A | Addition products of di-acetylene-terminated polyimide derivatives with a polyimide having terminal non-conjugated acetylene groups | Chemistry; Metallurgy | 46 | Expired |
| US4405519A | Di-Acetylene-terminated polyimide derivatives | Chemistry; Metallurgy | 46 | Expired |
| US4405520A | Addition products of di-acetylene-terminated polymide derivatives and dienophiles having terminal maleimide grops | Chemistry; Metallurgy | 46 | Expired |
| US4418181A | Polyimides having bis-maleimide terminal groups | Chemistry; Metallurgy | 45 | Expired |
| US4550015A | Vitreous carbon and process for preparation thereof | Chemistry; Metallurgy | 40 | Expired |
| US4168366A | Polyimide derivatives | Emerging Cross-Sectional Technologies | 38 | Expired |
| US4438280A | Bis-(maleamic acid) derivatives of triamines | Chemistry; Metallurgy | 34 | Expired |
| US4166168A | Polymerization products of acetylene-terminated polyimide derivatives | Emerging Cross-Sectional Technologies | 29 | Expired |
| US6209830A | Apparatus for camera mount on tripod platform | Mechanical Engineering; Lighting; Heating | 23 | Expired |
| US4168360A | Polymerization products of vinyl-terminated polyimide derivatives | Emerging Cross-Sectional Technologies | 18 | Expired |
| US4316844A | Polyimide derivatives having unsaturated terminal amic acid groups | Chemistry; Metallurgy | 18 | Expired |
| US4352907A | Polyethyleneterephthalate ternary blends | Chemistry; Metallurgy | 17 | Expired |
| US4668496A | Vitreous carbon | Chemistry; Metallurgy | 17 | Expired |
| US4410664A | Polyimide-epoxy thermoset resins | Chemistry; Metallurgy | 17 | Expired |
| US4520198A | Vinylacetylene-terminated polyimide derivatives | Chemistry; Metallurgy | 15 | Expired |
| US4465806A | Unsaturated polyester molding compounds with improved resistance to thermal and humid aging | Emerging Cross-Sectional Technologies | 15 | Expired |
| US4952629A | Thermoplastic polyester blends | Chemistry; Metallurgy | 14 | Expired |
| US4517354A | Polysulfone compositions and derivatives thereof | Chemistry; Metallurgy | 14 | Expired |
| US4365036A | Fast crystallizing polyalkyleneterephthalate resin compositions | Chemistry; Metallurgy | 14 | Expired |
| US4626569A | Process for producing a molded product and the molded product produced thereby | Chemistry; Metallurgy | 12 | Expired |
| USRE32319E | Vitreous carbon and process for preparation thereof | General | 12 | Expired |
| US4277583A | Oxirane polyimide copolymers | Chemistry; Metallurgy | 12 | Expired |
| US4558085A | Process for the preparation of fast crystallizing polyalkyleneterephthalate resin compositions | Chemistry; Metallurgy | 12 | Expired |
| US4168367A | Acetylene-terminated polyimide derivatives | Emerging Cross-Sectional Technologies | 11 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.