Patent US2384209A successfully refreshed from Google Patents.
US2384209A
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US
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Method of producing optical wedges
Assignee: Individual
•
Filing: 1940-07-13
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Granted: 1945-09-04
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Expires: 1960-07-13
Abstract
No abstract record available.
Inventors
- 👤 Thomas W Sukumlyn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:24
CPC Classifications
G; G02; G02B; G02B1/00; G02B1/10; C; C23; C23C; C23C14/00; C23C14/04; C23C14/042; C23C14/044; G02B5/00; G02B5/04; G02B5/18; G02B5/1847; G02B5/1852
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) | 1948-09-03 | 1949-03-05 | 1949-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-09-03 | 1953-03-05 | 1953-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-09-03 | 1957-03-05 | 1957-09-04 | $7700.00 | Window Closed / Lapsed |