Essilor International (Compagnie Generale d'Optique)
🏢 View company profile →754Patents
497Active
754Granted
58Portfolio score
Filing activity: Jun 24, 1974 → Nov 21, 2019 · 274 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5016977A | Optical lens for correcting astigmatism | Physics | 428 | Expired |
| US6145987A | Multifocal ophthalmic lenses with spherical aberration varying with the addition and the ametropia | Physics | 151 | Expired |
| US5114220A | Multiple contour diffractive lens | Physics | 104 | Expired |
| US5201501A | Unit for grasping and clamping circular objects | Emerging Cross-Sectional Technologies | 87 | Expired |
| US5702825A | Low yellow index polymer compositions, polymerizable compositions and lenses using said compositions | Emerging Cross-Sectional Technologies | 82 | Expired |
| US7159983B2 | Multifocal lenses for pre-presbyopic individuals | Physics | 81 | Expired |
| US6709107B2 | Composite ophthalmic lens and method for obtaining same | Emerging Cross-Sectional Technologies | 81 | 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 |
| US7229173B2 | Short corridor progressive addition lenses with reduced unwanted astigmatism | Physics | 70 | Expired |
| US5807906A | Process for obtaining a transparent article with a refractive index gradient | Physics | 69 | Expired |
| US5270745A | Progressive multifocal ophthalmic lens | Physics | 66 | Expired |
| US5662839A | Method of filling a mold for manufacturing an optical lens | Emerging Cross-Sectional Technologies | 62 | Expired |
| US5258024A | Method of manufacture of a lens of transparent polymer having a modulated refractive index | Physics | 59 | Expired |
| US6017121A | Multifocal artificial ocular lens with a transparency varying with illumination | Physics | 58 | 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 |
| US7656581B2 | Transparent and polarizing viewing element having a zone associated with an obliquely oriented polarizing filter | Human Necessities | 52 | Expired |
| US8118427B2 | Method for optimizing and/or manufacturing eyeglass lenses | Physics | 51 | Active |
| US6218494A | Abrasion-resistant coating composition process for making such coating composition and article coated therewith | Emerging Cross-Sectional Technologies | 49 | Expired |
| US5104212A | Diffractive contact lens in relief | Physics | 48 | Expired |
| US6379008B1 | Method of determining the shape of an opthalmic contact lens for correcting optical aberrations of the eye beyond defocusing or astigmatism and system for implementing the method | Human Necessities | 43 | Expired |
| US5272495A | Progressive multifocal ophthalmic lens | Physics | 42 | Expired |
| US8052278B2 | Randomly pixellated optical component, its fabrication method and its use in the fabrication of a transparent optical element | Physics | 42 | Active |
| US4940751A | Wettable silicon elastomer for the manufacture of contact lenses | Chemistry; Metallurgy | 42 | Expired |
| US8231220B2 | Method of measuring at least one geometrico-physionomic parameter for positioning a frame of vision-correcting eyeglasses on the face of a wearer | Physics | 41 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.