US2448548A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coupling
Assignee: Individual
•
Filing: 1944-04-05
•
Granted: 1948-09-07
•
Expires: 1964-04-05
Abstract
No abstract record available.
Inventors
- 👤 George W Purdy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:10
CPC Classifications
H; H01; H01R; H01R4/00; H01R4/54; F; F16; F16B; F16B7/00; F16B7/20; H01R2101/00; Y; Y10; Y10T; Y10T403/00; Y10T403/66; Y10T403/70; Y10T403/7075; Y10T403/7077; Y10T403/7079
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1069146A
Cited
US1093528A
Cited
FR630355A
Cited
GB394972A
Cited
US2032196A
Cited
US2056739A
Cited
US2044052A
Cited
US2267802A
Cited
US2299357A
Cited
US2362856A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-09-07 | 1952-03-08 | 1952-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-09-07 | 1956-03-08 | 1956-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-09-07 | 1960-03-08 | 1960-09-07 | $7700.00 | Window Closed / Lapsed |