US2456801A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical heat detection system
Assignee: RCA Corp
•
Filing: 1944-02-14
•
Granted: 1948-12-21
•
Expires: 1964-02-14
Abstract
No abstract record available.
Inventors
- 👤 William A Tolson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:54
CPC Classifications
G; G02; G02B; G02B23/00; G02B23/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US504890A
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US1642011A
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US1936514A
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US2031884A
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US2155471A
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US2115578A
Cited
US2288766A
Cited
US2332154A
Cited
US2424976A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-12-21 | 1952-06-21 | 1952-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-12-21 | 1956-06-21 | 1956-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-12-21 | 1960-06-21 | 1960-12-21 | $7700.00 | Window Closed / Lapsed |