Patent US517509A successfully refreshed from Google Patents.
Patent US2500057A successfully refreshed from Google Patents.
US2500057A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring balanced hinge
Assignee: International Motors LLC
•
Filing: 1945-10-24
•
Granted: 1950-03-07
•
Expires: 1965-10-24
Abstract
No abstract record available.
Inventors
- 👤 William F Borgerd
- 👤 John S Palmer
- 👤 Lester H Hinkel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:52
CPC Classifications
E; E05; E05F; E05F1/00; E05F1/08; E05F1/10; E05F1/12; E05F1/1246; E05F1/1269; E05F1/1276; E05Y; E05Y2900/00; E05Y2900/20
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-06 | 1953-09-05 | 1954-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-06 | 1957-09-05 | 1958-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-06 | 1961-09-05 | 1962-03-07 | $7700.00 | Window Closed / Lapsed |