Patent US2331716A successfully refreshed from Google Patents.
US2331716A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nonreflecting coating
Assignee: Eastman Kodak Co
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Filing: 1940-09-26
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Granted: 1943-10-12
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Expires: 1960-09-26
Abstract
No abstract record available.
Inventors
- 👤 Gale F Nadeau
- 👤 Edwin H Hilborn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:41
CPC Classifications
G; G02; G02B; G02B1/00; G02B1/10; G02B1/11; G02B1/113; G02B1/115; G03; G03C; G03C1/00; G03C1/76; G03C1/825; Y; Y10; Y10S; Y10S430/00; Y10S430/151
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) | 1946-10-11 | 1947-04-12 | 1947-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-10-11 | 1951-04-12 | 1951-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-10-11 | 1955-04-12 | 1955-10-12 | $7700.00 | Window Closed / Lapsed |