US3416907A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming zinc oxide infrared transmitting optical element
Assignee: Eastman Kodak Co
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Filing: 1965-06-30
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Granted: 1968-12-17
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Expires: 1985-06-30
Abstract
No abstract record available.
Inventors
- 👤 Jr Edward Carnall
- 👤 Donald W Roy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:51
CPC Classifications
C; C04; C04B; C04B33/00; C04B33/32; C04B33/326; C01; C01G; C01G9/00; C01G9/02; C04B35/00; C04B35/01; C04B35/453; C04B35/622; C04B35/64; C04B35/645; G; G02; G02B; G02B1/00; G02B1/02
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) | 1971-12-17 | 1972-06-17 | 1972-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-17 | 1976-06-17 | 1976-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-17 | 1980-06-17 | 1980-12-17 | $7700.00 | Window Closed / Lapsed |