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US2463906A
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Apparatus and method for making optical devices
Assignee: American Optical Corp
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Filing: 1944-04-20
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Granted: 1949-03-08
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Expires: 1964-04-20
Abstract
No abstract record available.
Inventors
- 👤 Gilbert E Pride
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:42
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/22; C23C14/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1915631A
Cited
US2160714A
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US2077442A
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US2103623A
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US2239770A
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US2295759A
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US2337329A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-03-07 | 1952-09-06 | 1953-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-03-07 | 1956-09-06 | 1957-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-03-07 | 1960-09-06 | 1961-03-08 | $7700.00 | Window Closed / Lapsed |