US3222432A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of producing optical and ophthalmic lenses from thermosetting resin materials
Assignee: Lentilles Ophtalmiques Rationnelles
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Filing: 1963-04-08
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Granted: 1965-12-07
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Expires: 1983-04-08
Abstract
No abstract record available.
Inventors
- 👤 Grandperret Rene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:49
CPC Classifications
B; B29; B29D; B29D11/00; B29D11/00009; B29D11/0048; B29D11/00528; B29C; B29C33/00; B29C33/0038; B29D11/00413; B29L; B29L2011/00; B29L2011/0016; Y; Y10; Y10S; Y10S425/00; Y10S425/808
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
A METHOD OF MANUFACTURING OPTHALMIC LENSES OF THERMOSETTING RESIN HAVING A THICKNESS WHICH VARIES FROM THE CENTER TO THE PERIPHERY THEREOF, COMPRISING INTRODUCING LIQUID MONOMERIC RESIN INTO A MOLD CONSTITUTED BY TWO PLATES, AT LEAST ONE OF SAID PLATES BEING A THIN PLAT OF QUENCHED GLASS HAVING PARALLEL OPPOSITE FACES, SAID PLATES HABING THE CONFIGURATION OF THE CORRESPONDING FACE OF THE LENS TO BE PRODUCED, THE MOLD BEING BORDERED EDGEWISE BY A QUANTITY OF FLEXIBLE MATERIAL, HEATING THE MOLD UNTIL THE RESIN GELS, REMOVING SAID FLEXIBLE MATERIAL FROM THE PERIPHERY OF THE GELLED RESIN, APPLYING A LAYER OF SAID MONOMERIC RESIN TO THE EXPOSED PERIPHERY OF THE GELLED RESIN, HEATIN GHE MOLD UNTIL THE RESIN POLYMERIZED TO FORM A SOLID LENS, AND REMOVING THE PLATES FROM THE LENS.
Claim 2
Independent Claim
128 words
A METHOD OF MANUFACTURING OPTHALMIC LENSES OF THERMOSETTING RESIN HAVING A THICKNESS WHICH VARIES FROM THE CENTER TO THE PERIPHERY THEREOF, COMPRISING INTRODUCING LIQUID MONOMERIC RESIN INTO A MOLD CONSTITUTED BY TWO PLATES, AT LEAST ONE OF SAID PLATES BEING A THIN PLAT OF QUENCHED GLASS HAVING PARALLEL OPPOSITE FACES, SAID PLATES HABING THE CONFIGURATION OF THE CORRESPONDING FACE OF THE LENS TO BE PRODUCED, THE MOLD BEING BORDERED EDGEWISE BY A QUANTITY OF FLEXIBLE MATERIAL, HEATING THE MOLD UNTIL THE RESIN GELS, REMOVING SAID FLEXIBLE MATERIAL FROM THE PERIPHERY OF THE GELLED RESIN, APPLYING A LAYER OF SAID MONOMERIC RESIN TO THE EXPOSED PERIPHERY OF THE GELLED RESIN, HEATIN GHE MOLD UNTIL THE RESIN POLYMERIZED TO FORM A SOLID LENS, AND REMOVING THE PLATES FROM THE LENS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-06 | 1969-06-07 | 1969-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-06 | 1973-06-07 | 1973-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-06 | 1977-06-07 | 1977-12-07 | $7700.00 | Window Closed / Lapsed |