US3718349A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cipher device and method
Assignee: Individual
•
Filing: 1954-04-06
•
Granted: 1973-02-27
•
Expires: 1974-04-06
Abstract
Abstract 1. A CIPHER DEVICE COMPRISING A SHEET HAVING OBVERSE AND REVERSE SURFACES, A PLURALITY OF PLAIN TEXT ALPHABETS COMPRISING CHARACTERS ON ONE SURFACE THEREOF AND A PLURALITY OF CIPHER TEST ALPHABETS COMPRISING CHARACTERS ON THE OTHER SURFACE THEREOF EACH CHARACTER OF EACH ALPHABET ON SAID ONE SURFACE HAVING A SUBSTANTIALLY REGISTERING CHARACTER OF AN ALPHABET ON SAID OTHER SURFACE.
Inventors
- 👤 A Small
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:53
CPC Classifications
G; G09; G09C; G09C1/00; G09C1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-27 | 1976-08-28 | 1977-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-27 | 1980-08-28 | 1981-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-27 | 1984-08-28 | 1985-02-27 | $7700.00 | Window Closed / Lapsed |