Patent US4611578A successfully refreshed from Google Patents.
US2036447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light regulating means
Assignee: Eastman Kodak Co
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Filing: 1929-01-19
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Granted: 1936-04-07
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Expires: 1949-01-19
Abstract
No abstract record available.
Inventors
- 👤 Clifton M Tuttle
- 👤 Fordyce E Tuttle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:33
CPC Classifications
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Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1939-04-07 | 1939-10-07 | 1940-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-04-07 | 1943-10-07 | 1944-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-04-07 | 1947-10-07 | 1948-04-07 | $7700.00 | Window Closed / Lapsed |