US2521701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coupling
Assignee: Individual
•
Filing: 1946-12-27
•
Granted: 1950-09-12
•
Expires: 1966-12-27
Abstract
No abstract record available.
Inventors
- 👤 Clarence E Earle
- 👤 Carl A Covington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:00
CPC Classifications
F; F16; F16L; F16L37/00; F16L37/22; F16L37/23; H; H01; H01R; H01R13/00; H01R13/62; H01R13/627; H01R13/6276
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1468732A
Cited
US2377812A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-11 | 1954-03-13 | 1954-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-11 | 1958-03-13 | 1958-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-11 | 1962-03-13 | 1962-09-12 | $7700.00 | Window Closed / Lapsed |