Patent US2904824A successfully refreshed from Google Patents.
US2904824A
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US
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Gravity hinge
Assignee: Fiat Metal Manufacturing Co Inc
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Filing: 1955-09-19
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Granted: 1959-09-22
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Expires: 1975-09-19
Abstract
No abstract record available.
Inventors
- 👤 Thomas J Kuehl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:29
CPC Classifications
E; E05; E05F; E05F1/00; E05F1/02; E05F1/04; E05F1/06; E05F1/061; E05F1/063
Claims Analysis
Total Claims: 0
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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) | 1962-09-21 | 1963-03-23 | 1963-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-21 | 1967-03-23 | 1967-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-21 | 1971-03-23 | 1971-09-22 | $7700.00 | Window Closed / Lapsed |