Leigh E. Walker
34Patents
15h-index
7Co-inventors
74Inventor score
Filing activity: Jan 15, 1975 → Oct 7, 2009
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5833741A | Waterproofing and preservative compositons for wood | Performing Operations; Transporting | 66 | Expired |
| US5438034A | Quaternary ammonium carbonate compositions and preparation thereof | Emerging Cross-Sectional Technologies | 41 | Expired |
| US6485790B2 | Methods for enhancing penetration of wood preservatives | Performing Operations; Transporting | 24 | Expired |
| US6340384B1 | Copper/amine oxide wood preservatives | Performing Operations; Transporting | 23 | Expired |
| US6527981B1 | Azole/amine oxide preservatives | Emerging Cross-Sectional Technologies | 23 | Expired |
| US6572788B2 | Amine oxide wood preservatives | Performing Operations; Transporting | 23 | Expired |
| US4806581A | Graft polymers of polymerizable monomers and olefin polymers | Chemistry; Metallurgy | 22 | Expired |
| US4537933A | Blends of polyolefin graft polymers and ASA polymers | Chemistry; Metallurgy | 20 | Expired |
| US6989459B2 | In situ process for preparing quaternary ammonium bicarbonates and quaternary ammonium carbonates | Chemistry; Metallurgy | 20 | Expired |
| US6375727B1 | Amine oxide/iodine containing blends for wood preservation | Performing Operations; Transporting | 17 | Expired |
| US6087303A | Quaternary ammonium carboxylate and borate compositions and preparation thereof | Emerging Cross-Sectional Technologies | 16 | Expired |
| US5855817A | Waterproofing and preservative compositions and preparation thereof | Emerging Cross-Sectional Technologies | 15 | Expired |
| US4661549A | Graft polymers of polymerizable monomers and olefin polymers | Chemistry; Metallurgy | 15 | Expired |
| US6448279B1 | Isothiazolone/amine oxide wood preservatives | Performing Operations; Transporting | 15 | Expired |
| US4536545A | Graft polymers of polymerizable monomers and olefin polymers | Chemistry; Metallurgy | 15 | Expired |
| US5700841A | Quaternary ammonium carboxylate and borate compositions and preparation thereof | Emerging Cross-Sectional Technologies | 14 | Expired |
| US5891921A | Quaternary ammonium carboxylate and borate compositions and preparation thereof | Emerging Cross-Sectional Technologies | 13 | Expired |
| US5641726A | Quaternary ammonium carboxylate and borate compositions and preparation thereof | Emerging Cross-Sectional Technologies | 13 | Expired |
| US6508869B2 | Boron compound/amine oxide compositions | Performing Operations; Transporting | 13 | Expired |
| US4587297A | Blends of polyolefin-vinyl chloride graft polymers and condensation polymers | Chemistry; Metallurgy | 11 | Expired |
| US4605704A | Graft polymers of polymerizable monomers and olefin polymers | Chemistry; Metallurgy | 11 | Expired |
| US5523487A | Quaternary ammonium carbonate compositions and preparation thereof | Emerging Cross-Sectional Technologies | 11 | Expired |
| US4562229A | Blends of polyolefin graft polymers and SMA polymers | Chemistry; Metallurgy | 10 | Expired |
| US4195137A | Method of preparing vinyl halide polymers and copolymers with polyolefins | Chemistry; Metallurgy | 10 | Expired |
| US5399762A | Quaternary ammonium hydroxide compositions and preparation thereof | Emerging Cross-Sectional Technologies | 8 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.