US3012667A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Document sensing method and system utilizing infra-red stimulated phosphors
Assignee: Unisys Corp
•
Filing: 1957-02-05
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Granted: 1961-12-12
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Expires: 1977-02-05
Abstract
No abstract record available.
Inventors
- 👤 Adams George Richard
- 👤 Thomas R Cleary
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:52
CPC Classifications
G; G06; G06K; G06K7/00; G06K7/10; G06K7/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2742631A
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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) | 1964-12-11 | 1965-06-12 | 1965-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-11 | 1969-06-12 | 1969-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-11 | 1973-06-12 | 1973-12-12 | $7700.00 | Window Closed / Lapsed |