US3365271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnesium fluoride optical element
Assignee: Eastman Kodak Co
•
Filing: 1966-02-25
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Granted: 1968-01-23
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Expires: 1986-02-25
Abstract
No abstract record available.
Inventors
- 👤 Jr Edward Carnall
- 👤 Sherley E Hatch
- 👤 Leroy S Ladd
- 👤 William F Parsons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:24
CPC Classifications
G; G02; G02B; G02B1/00; G02B1/02; C; C04; C04B; C04B35/00; C04B35/515
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-01-22 | 1971-07-24 | 1972-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-22 | 1975-07-24 | 1976-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-22 | 1979-07-24 | 1980-01-23 | $7700.00 | Window Closed / Lapsed |