William J. Trepka
31Patents
16h-index
13Co-inventors
78Inventor score
Filing activity: Jan 25, 1971 → Nov 12, 1997
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5227419A | Tapered block styrene/butadiene copolymers | Chemistry; Metallurgy | 80 | Expired |
| US5130377A | Tapered block styrene/butadiene copolymers | Chemistry; Metallurgy | 78 | Expired |
| US5436298A | Block copolymers of monovinylarenes and conjugated dienes and preparation thereof | Chemistry; Metallurgy | 73 | Expired |
| US5256736A | Tapered block copolymers of conjugated dienes and monovinylarenes | Chemistry; Metallurgy | 71 | Expired |
| US5399628A | Block copolymers of monovinylarenes and conjugated dienes containing two interior tapered blocks | Chemistry; Metallurgy | 64 | Expired |
| US4145298A | Hydrogenated lithiated copolymers grafted with organic nitrogen compounds as viscosity index improvers having dispersant properties | Chemistry; Metallurgy | 53 | Expired |
| US5545690A | Tapered block copolymers of monovinylarenes and conjugated dienes | Chemistry; Metallurgy | 43 | Expired |
| US5910546A | Tapered block copolymers of monivinylarenes and conjugated dienes | Chemistry; Metallurgy | 41 | Expired |
| US6265485A | Tapered block copolymers of monovinylarenes and conjugated dienes | Chemistry; Metallurgy | 40 | Expired |
| US4412087A | Viscosity index improver with high thickening power | Chemistry; Metallurgy | 32 | Expired |
| US6265484A | Tapered block copolymers of monovinylarenes and conjugated dienes | Chemistry; Metallurgy | 30 | Expired |
| US5319033A | Tapered block monovinyl aromatic/conjugated diene copolymer | Chemistry; Metallurgy | 28 | Expired |
| US5705569A | Block copolymers of monovinylarenes and conjugated dienes and preparation thereof | Chemistry; Metallurgy | 27 | Expired |
| US4238202A | Hydrocarbon fuels with carburetor detergent properties | Chemistry; Metallurgy | 27 | Expired |
| US4076915A | Treatment of coupled polymers prior to hydrogenation | Chemistry; Metallurgy | 22 | Expired |
| US4402844A | Viscosity index improvers with dispersant properties prepared by reaction of lithiated hydrogenated copolymers with substituted aminolactams | Chemistry; Metallurgy | 17 | Expired |
| US5587425A | Blends of copolymers of monovinylarenes and conjugated dienes containing two interior tapered blocks | Chemistry; Metallurgy | 16 | Expired |
| US4471099A | Treatment of a hydrogenated polymer solution after hydrogenation catalyst removal to improve subsequent lithiation reaction | Chemistry; Metallurgy | 13 | Expired |
| US5422389A | Method for stabilizing monovinylarene/conjugated diene copolymers and a method for preparing a stabilizing mixture | Chemistry; Metallurgy | 11 | Expired |
| US4105714A | Coupling of alkali metal-terminated polymers | Chemistry; Metallurgy | 10 | Expired |
| US5270396A | Sequential coupling in formation of resinous block copolymers | Chemistry; Metallurgy | 10 | Expired |
| US4418234A | Viscosity index improver soluble in synthetic poly(.alpha.-olefin) lubricants | Chemistry; Metallurgy | 9 | Expired |
| US4158098A | Organo lithium initiator | Chemistry; Metallurgy | 8 | Expired |
| US4238576A | Orthoesters as coupling agents for producing novel polymers | Chemistry; Metallurgy | 5 | Expired |
| US3931107A | Polyalkoxy monovinylaromatic compound in copolymerization of a conjugated diene with a monovinyl-substituted aromatic compound | Chemistry; Metallurgy | 5 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.