US3440938A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic exposure control for photoflash
Assignee: Eastman Kodak Co
•
Filing: 1965-12-08
•
Granted: 1969-04-29
•
Expires: 1985-12-08
Abstract
No abstract record available.
Inventors
- 👤 Allen G Stimson
- 👤 John H Eagle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:12
CPC Classifications
G; G03; G03B; G03B9/00; G03B9/70; G03B7/00; G03B7/08; G03B7/081; G03B7/083; G03B7/16; G03B9/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2179717A
Cited
US3056341A
Cited
US3059526A
Cited
US3020816A
Cited
US3165989A
Cited
US3200723A
Cited
US3295429A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-28 | 1972-10-28 | 1973-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-28 | 1976-10-28 | 1977-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-28 | 1980-10-28 | 1981-04-29 | $7700.00 | Window Closed / Lapsed |