US2504351A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Friction-controlled hinge
Assignee: FRANCIS M BLAKENEY
•
Filing: 1947-01-09
•
Granted: 1950-04-18
•
Expires: 1967-01-09
Abstract
No abstract record available.
Inventors
- 👤 Ernest A Ring
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:18
CPC Classifications
E; E05; E05D; E05D11/00; E05D11/08; E05D11/082; E05D5/00; E05D5/10; E05Y; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/132
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-04-17 | 1953-10-17 | 1954-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-17 | 1957-10-17 | 1958-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-17 | 1961-10-17 | 1962-04-18 | $7700.00 | Window Closed / Lapsed |