Patent US3605195A successfully refreshed from Google Patents.
US3605195A
Expired / Lapsed
US
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Mold assembly for casting plastic optical lenses
Assignee: Individual
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Filing: 1970-08-24
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Granted: 1971-09-20
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Expires: 1990-08-24
Abstract
Abstract A GASKET RING AND MOLD ASSEMBLY FOR CASTING PLASTIC CONCAVO-CONVEX LENSES SO DESIGNED THAT THE GASKET RING CAN BE ASSEMBLED INTERCHANGEABLY EITHER END UP WITHOUT ADVERSE EFFECTS. THE RING IS OF T-SHAPE IN CROSS SECTION WITH THE OPPOSITE SIDES OF ITS T-STEM OPPOSITELY SLOPED TO ONE ANOTHER SO THAT EITHER SEATS AGAINST THE INNER CONVEX SURFACE OF THE CONVEX UPPER MOLD MEMBER OR AGAINST THE SIMILARLY BUT OPPOSITELY BEVELED UPPER RIM EDGE OF THE LOWER CONCAVE MOLD MEMBER.
Inventors
- 👤 Charles D Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:31
CPC Classifications
B; B29; B29D; B29D11/00; B29D11/00009; B29D11/0048; B29D11/00528; B29C; B29C33/00; B29C33/0038; B29D11/00413; B29L; B29L2031/00; B29L2031/76; B29L2031/7602; Y; Y10; Y10S; Y10S425/00; Y10S425/808
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |