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US2936674A
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Method of making a multifocal ophthalmic lens
Assignee: Camelot Industries Corp
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Filing: 1952-11-08
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Granted: 1960-05-17
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Expires: 1972-11-08
Abstract
No abstract record available.
Inventors
- 👤 George A Beasley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:48
CPC Classifications
G; G02; G02C; G02C7/00; G02C7/02; G02C7/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1267821A
Cited
US1221967A
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GB113191A
Cited
US1340021A
Cited
US2054166A
Cited
US2049095A
Cited
US2183885A
Cited
US2274142A
Cited
US2274143A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-17 | 1963-11-16 | 1964-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-17 | 1967-11-16 | 1968-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-17 | 1971-11-16 | 1972-05-17 | $7700.00 | Window Closed / Lapsed |