Cletus N. Welch
25Patents
15h-index
21Co-inventors
81Inventor score
Filing activity: Mar 4, 1974 → Oct 16, 2002
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4880667A | Photochromic plastic article and method for preparing same | Physics | 158 | Expired |
| US5391327A | Photochromic compositions of improved fatigue resistance | Chemistry; Metallurgy | 150 | Expired |
| US6268055A | Photochromic epoxy resin coating composition and articles having such a coating | Emerging Cross-Sectional Technologies | 116 | Expired |
| US6060001A | Alkoxyacrylamide photochromic coatings compositions and photochromic articles | Emerging Cross-Sectional Technologies | 111 | Expired |
| US6602603B2 | Poly(meth)acrylic photochromic coating | Emerging Cross-Sectional Technologies | 104 | Expired |
| US6432544B1 | Aminoplast resin photochromic coating composition and photochromic articles | Emerging Cross-Sectional Technologies | 103 | Expired |
| US6506488B1 | Aminoplast resin photochromic coating composition and photochromic articles | Emerging Cross-Sectional Technologies | 102 | Expired |
| US6436525B1 | Polyanhydride photochromic coating composition and photochromic articles | Emerging Cross-Sectional Technologies | 88 | Expired |
| US5185390A | Water strippable photochromic resin composition | Chemistry; Metallurgy | 68 | Expired |
| US5130353A | Method for preparing photochromic plastic article | Chemistry; Metallurgy | 62 | Expired |
| US4253922A | Cathode electrocatalysts for solid polymer electrolyte chlor-alkali cells | Chemistry; Metallurgy | 44 | Expired |
| US4135995A | Method of electrolysis, and electrode for the electrolysis | Chemistry; Metallurgy | 22 | Expired |
| US4251478A | Porous nickel cathode | Chemistry; Metallurgy | 18 | Expired |
| US4248679A | Electrolysis of alkali metal chloride in a cell having a nickel-molybdenum cathode | Chemistry; Metallurgy | 17 | Expired |
| US6998072B2 | Photochromic polymerizable compositions | Emerging Cross-Sectional Technologies | 16 | Expired |
| US6916537B2 | Articles having a photochromic polymeric coating | Emerging Cross-Sectional Technologies | 12 | Expired |
| US4323595A | Nickel-molybdenum cathode | Chemistry; Metallurgy | 12 | Expired |
| US4328200A | Process for producing calcium hypochlorite | Emerging Cross-Sectional Technologies | 12 | Expired |
| US4675357A | Near infrared absorbing polymerizate | Mechanical Engineering; Lighting; Heating | 10 | Expired |
| US4101624A | Method of casting silicon | Chemistry; Metallurgy | 8 | Expired |
| US4396473A | Cathode prepared by electro arc spray metallization, electro arc spray metallization method of preparing a cathode, and electrolysis with a cathode prepared by electro arc spray metallization | Emerging Cross-Sectional Technologies | 8 | Expired |
| US4390512A | Process for producing calcium hypochlorite | Emerging Cross-Sectional Technologies | 7 | Expired |
| US3956098A | Apparatus containing silicon metal joints | Emerging Cross-Sectional Technologies | 6 | Expired |
| US4312738A | Cathode electrocatalysts for solid polymer electrolyte chlor-alkali cells | Chemistry; Metallurgy | 0 | Expired |
| US3958741A | Method of mounting silicon anodes in a chlor-alkali cell | Chemistry; Metallurgy | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.