US2643474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Display means
Assignee: Individual
•
Filing: 1946-08-05
•
Granted: 1953-06-30
•
Expires: 1966-08-05
Abstract
No abstract record available.
Inventors
- 👤 Leo D Grenot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:01
CPC Classifications
G; G09; G09F; G09F5/00; G09F5/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2432515A
Cited
GB190004043A
Cited
US811658A
Cited
US1073768A
Cited
US1652842A
Cited
US2110709A
Cited
US2193296A
Cited
US2249558A
Cited
US2434860A
Cited
US2431472A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-29 | 1956-12-29 | 1957-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-29 | 1960-12-29 | 1961-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-29 | 1964-12-29 | 1965-06-30 | $7700.00 | Window Closed / Lapsed |