US2911682A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of casting a multireflector prism in a flexible mold
Assignee: Eastman Kodak Co
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Filing: 1955-02-28
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Granted: 1959-11-10
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Expires: 1975-02-28
Abstract
No abstract record available.
Inventors
- 👤 William P Ewald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:59
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/04; Y; Y10; Y10S; Y10S425/00; Y10S425/808
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2154639A
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US2218260A
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US2379790A
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US2406361A
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US2422954A
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US2409958A
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US2479935A
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US2464738A
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US2568274A
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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) | 1962-11-09 | 1963-05-11 | 1963-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-09 | 1967-05-11 | 1967-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-09 | 1971-05-11 | 1971-11-10 | $7700.00 | Window Closed / Lapsed |