Patent US2583737A successfully refreshed from Google Patents.
US2583737A
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US
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Photoelectric recording device
Assignee: Federal Cartridge Corp
•
Filing: 1947-04-28
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Granted: 1952-01-29
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Expires: 1967-04-28
Abstract
No abstract record available.
Inventors
- 👤 Hoffman Harry William
- 👤 Helmer Esther Helen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:07
CPC Classifications
H; H01; H01J; H01J40/00; H01J40/02; H01J40/14
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) | 1955-01-28 | 1955-07-30 | 1956-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-28 | 1959-07-30 | 1960-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-28 | 1963-07-30 | 1964-01-29 | $7700.00 | Window Closed / Lapsed |