US2465367A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for enciphering facsimiles
Assignee: Individual
•
Filing: 1943-03-12
•
Granted: 1949-03-29
•
Expires: 1963-03-12
Abstract
No abstract record available.
Inventors
- 👤 William F Friedman
- 👤 Joseph O Mauborgne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:47
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/44; H04N1/448
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1310719A
Cited
US1312574A
Cited
US1657366A
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US1868967A
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US1763358A
Cited
US2066261A
Cited
US2300664A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-03-28 | 1952-09-27 | 1953-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-03-28 | 1956-09-27 | 1957-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-03-28 | 1960-09-27 | 1961-03-29 | $7700.00 | Window Closed / Lapsed |