US2984700A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for cryptography
Assignee: Individual
•
Filing: 1944-09-22
•
Granted: 1961-05-16
•
Expires: 1964-09-22
Abstract
No abstract record available.
Inventors
- 👤 Albert W Small
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:42
CPC Classifications
G; G09; G09C; G09C1/00; G09C1/06; G09C1/10
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-15 | 1964-11-14 | 1965-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-15 | 1968-11-14 | 1969-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-15 | 1972-11-14 | 1973-05-16 | $7700.00 | Window Closed / Lapsed |