US3171869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for manufacturing curved optical articles
Assignee: Bausch and Lomb Inc
•
Filing: 1959-12-07
•
Granted: 1965-03-02
•
Expires: 1979-12-07
Abstract
No abstract record available.
Inventors
- 👤 Joseph W Weinberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:18
CPC Classifications
B; B29; B29D; B29D11/00; B29D11/00009; B29D11/00038; B29D11/00125; B29D11/00192; B29C; B29C39/00; B29C39/003; B29C39/006; G; G02; G02B; G02B1/00; G02B1/04; G02B1/041
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A PROCESS FOR MANUFACTURING CURVED OPTICAL ARTICLES OF HIGH PRECISION FROM SYNTHETIC RESINOUS MATERIALS WHICH COMPRISES POLYMERIZING IN A TWO PIECE GLASS MOLD MADE OF MOVABLE MOLD PIECES, AND AT A TEMPERATURE WITHIN THE RANGE FROM ABOUT 25* TO ABOUT 120*C., A COMPOSITION COMPRISING A LIQUID MONOMERIC POLYMERIZABLE MIXED ESTER OF A POLYHYDRIC ALCOHOL WITH AN ACID ESTER OF CARBONIC ACID AND AN UNSATURATED ALCOHOL HAVING POLYMERIZABLE ETHYLENIC UNSATURATION, AND A POLYMERIZATION CATALYST THEREFOR IN AN AMOUNT OF AT LEAST 1% BY WEIGHT OF THE MONOMER, UNTIL POLYMERIZED TO A SOLID RELATIVELY HARD GEL, AND THEN HEATING THE GEL WITHOUT REMOVING IT FROM THE MOLD AT A TEMPERATURE WITHIN THE RANGE FROM ABOUT 125* TO ABOUT 235*C. UNTIL POLYMERIZED TO A FINAL HARD SET.
Claim 2
Dependent Claim
124 words
A PROCESS FOR MANUFACTURING CURVED OPTICAL ARTICLES OF HIGH PRECISION FROM SYNTHETIC RESINOUS MATERIALS WHICH COMPRISES POLYMERIZING IN A TWO PIECE GLASS MOLD MADE OF MOVABLE MOLD PIECES, AND AT A TEMPERATURE WITHIN THE RANGE FROM ABOUT 25* TO ABOUT 120*C., A COMPOSITION COMPRISING A LIQUID MONOMERIC POLYMERIZABLE MIXED ESTER OF A POLYHYDRIC ALCOHOL WITH AN ACID ESTER OF CARBONIC ACID AND AN UNSATURATED ALCOHOL HAVING POLYMERIZABLE ETHYLENIC UNSATURATION, AND A POLYMERIZATION CATALYST THEREFOR IN AN AMOUNT OF AT LEAST 1% BY WEIGHT OF THE MONOMER, UNTIL POLYMERIZED TO A SOLID RELATIVELY HARD GEL, AND THEN HEATING THE GEL WITHOUT REMOVING IT FROM THE MOLD AT A TEMPERATURE WITHIN THE RANGE FROM ABOUT 125* TO ABOUT 235*C. UNTIL POLYMERIZED TO A FINAL HARD SET.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-01 | 1968-08-31 | 1969-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-01 | 1972-08-31 | 1973-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-01 | 1976-08-31 | 1977-03-02 | $7700.00 | Window Closed / Lapsed |