Patent US2878736A successfully refreshed from Google Patents.
US2878736A
Expired / Lapsed
US
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Shutter and diaphragm mechanism for cameras
Assignee: Polaroid Corp
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Filing: 1955-04-29
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Granted: 1959-03-24
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Expires: 1975-04-29
Abstract
No abstract record available.
Inventors
- 👤 Richard R Wareham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:10
CPC Classifications
G; G03; G03B; G03B9/00; G03B9/08; G03B9/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2021765A
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US2429972A
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US2422018A
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US2490755A
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US2514302A
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US2504312A
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US2531936A
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US2509385A
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US2596328A
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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) | 1962-03-23 | 1962-09-22 | 1963-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-23 | 1966-09-22 | 1967-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-23 | 1970-09-22 | 1971-03-24 | $7700.00 | Window Closed / Lapsed |