US2544148A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Perpetual calendar
Assignee: TWENTIETH CENTURY INV S Ltd
•
Filing: 1946-12-12
•
Granted: 1951-03-06
•
Expires: 1966-12-12
Abstract
No abstract record available.
Inventors
- 👤 Flanagan John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:46
CPC Classifications
G; G09; G09D; G09D3/00; G09D3/04; G09D3/06
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1370220A
Cited
US1541102A
Cited
US1670316A
Cited
US641433A
Cited
FR489164A
Cited
FR566722A
Cited
US1692199A
Cited
US2343969A
Cited
US2400268A
Cited
US2470692A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-03-05 | 1954-09-04 | 1955-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-05 | 1958-09-04 | 1959-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-05 | 1962-09-04 | 1963-03-06 | $7700.00 | Window Closed / Lapsed |