US2812915A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Holder for a photosensitive element
Assignee: Individual
•
Filing: 1954-04-29
•
Granted: 1957-11-12
•
Expires: 1974-04-29
Abstract
No abstract record available.
Inventors
- 👤 Alan D Davies
- 👤 Singer Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:28
CPC Classifications
G; G02; G02B; G02B7/00; G03; G03B; G03B3/00; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32254; Y10T403/32262; Y10T403/32311
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1263783A
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US2147156A
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US2393851A
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US2418845A
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US2548089A
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US2723821A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-11 | 1961-05-13 | 1961-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-11 | 1965-05-13 | 1965-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-11 | 1969-05-13 | 1969-11-12 | $7700.00 | Window Closed / Lapsed |