US3438313A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic exposure control for photoflash exposures
Assignee: Polaroid Corp
•
Filing: 1966-03-04
•
Granted: 1969-04-15
•
Expires: 1986-03-04
Abstract
No abstract record available.
Inventors
- 👤 Jeremy M Topaz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:05
CPC Classifications
G; G03; G03B; G03B7/00; G03B7/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3258585A
Cited
US1936595A
Cited
US2112701A
Cited
US3000281A
Cited
US3072028A
Cited
US3278738A
Cited
US3358131A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-14 | 1972-10-14 | 1973-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-14 | 1976-10-14 | 1977-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-14 | 1980-10-14 | 1981-04-15 | $7700.00 | Window Closed / Lapsed |