Patent US3380109A successfully refreshed from Google Patents.
US3380109A
Expired / Lapsed
US
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Self-closing door hinge
Assignee: WILLIAM B RUIZ
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Filing: 1966-02-02
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Granted: 1968-04-30
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Expires: 1986-02-02
Abstract
No abstract record available.
Inventors
- 👤 William B Ruiz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:55
CPC Classifications
E; E05; E05F; E05F3/00; E05F3/20; E05F3/16; E05Y; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/132
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1442892A
Cited
US1612237A
Cited
US1837716A
Cited
US2018564A
Cited
US2203197A
Cited
US2328851A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-30 | 1971-10-30 | 1972-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-30 | 1975-10-30 | 1976-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-30 | 1979-10-30 | 1980-04-30 | $7700.00 | Window Closed / Lapsed |