Robert Guglielmetti
15Patents
11h-index
16Co-inventors
69Inventor score
Filing activity: May 19, 1975 → Feb 29, 2000
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4287337A | Spiropyran compounds of piperidine or thiazine rings | Physics | 84 | Expired |
| US6312811A | Photochromic naphtho [2,1-b]pyran compounds containing bithienyl or terthienyl substituents, process for their manufacture, and photochromic materials and articles obtained | Emerging Cross-Sectional Technologies | 76 | Expired |
| US6281366A | Photochromic [3H]naphtho[2,1-b]pyran compounds containing an acetylenic substituent, process for their manufacture, and photochromic materials and articles obtained | Chemistry; Metallurgy | 58 | Expired |
| US5139707A | Indolino-spiroquinoxalino oxazine photochromatic compounds, methods for their preparation, photochromic compositions and articles containing such compounds | Physics | 57 | Expired |
| US6136968A | Homoazaadamantane spirooxazines and their use in the field of ophthalmic optics | Chemistry; Metallurgy | 41 | Expired |
| US6019914A | Photochromic spirooxazine compounds, their use in the field of ophthalmic optics | Chemistry; Metallurgy | 34 | Expired |
| US5114621A | Indolino-spiro-oxazine photochromic compounds with five-membered rings, method for their preparation, photochromic compositions and articles containing such compounds | Physics | 23 | Expired |
| US5936016A | Photochromic compounds and methods for their use | Physics | 20 | Expired |
| US5631720A | Ophthalmic lenses with heterocyclic chromene compounds | Physics | 19 | Expired |
| US5604280A | Ring spiro [fluorene-[2H]-benzopyranes] and their use in ophthalmic optics | Emerging Cross-Sectional Technologies | 14 | Expired |
| US5233038A | Photochronic compounds of the indolino-spiro-benzoxazine type | Chemistry; Metallurgy | 13 | Expired |
| US5529725A | Spirooxazines and use thereof in the field of ophthalmic optics | Physics | 11 | Expired |
| US4052218A | Novel spiro-heterocyclic compounds, their preparation, and use thereof in a thermographic recording material | Chemistry; Metallurgy | 8 | Expired |
| US5527911A | Heterocyclic chromenes | Physics | 8 | Expired |
| US5754271A | Heterocyclic chromenes and their use in the field of ophthalmic optics | Physics | 4 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.