Norman Alfred Smith
13Patents
4h-index
11Co-inventors
53Inventor score
Filing activity: Jul 6, 1973 → Nov 21, 1984
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4268134A | Lightweight laminated photochromic lenses | Physics | 125 | Expired |
| US4526908A | Polyol blends of phthalate/trimellitate esters for polyurethane-polyisocyanurate foams | Chemistry; Metallurgy | 15 | Expired |
| US4104302A | Vinylsulphone hardeners | Physics | 8 | Expired |
| US4446216A | Photographic material | Emerging Cross-Sectional Technologies | 6 | Expired |
| US4076538A | Process for crosslinking hydrophilic colloids with triazine compounds | Physics | 4 | Expired |
| US4043995A | Process for crosslinking hydrophilic colloids | Physics | 3 | Expired |
| US3951940A | Method of producing a hardened gelatin layer using aqueous solution of a 2-halogeno pyridinium compound | Physics | 3 | Expired |
| US4014862A | Production of hardened gelatin layers by the addition of quaternary carbamoyl pyridinium compounds | Physics | 1 | Expired |
| US4560646A | Protected developing agents | Emerging Cross-Sectional Technologies | 1 | Expired |
| US4134765A | Vinylsulphone hardener | Chemistry; Metallurgy | 1 | Expired |
| US4088648A | Bis 1,4-(b-vinylso.sub.2 -propionyl)-piperazine | Physics | 1 | Expired |
| US4120898A | Sulfur containing vinyl amide cross-linking agents | Physics | 1 | Expired |
| US4540785A | Substituted hydroquinones | Physics | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.