US3409768A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light lock for air ionizer to shield photosensitive material
Assignee: Eastman Kodak Co
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Filing: 1967-04-03
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Granted: 1968-11-05
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Expires: 1987-04-03
Abstract
No abstract record available.
Inventors
- 👤 Thomas C Whitmore
- 👤 Peter H Zachmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:02
CPC Classifications
H; H05; H05F; H05F3/00; H05F3/04; G; G03; G03G; G03G15/00; G03G15/02; G03G15/0291
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) | 1971-11-05 | 1972-05-06 | 1972-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-05 | 1976-05-06 | 1976-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-05 | 1980-05-06 | 1980-11-05 | $7700.00 | Window Closed / Lapsed |