Patent US3469277A successfully refreshed from Google Patents.
US3469277A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-locking concealed hinge
Assignee: Hartwell Corp
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Filing: 1966-02-18
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Granted: 1969-09-30
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Expires: 1986-02-18
Abstract
No abstract record available.
Inventors
- 👤 Bernard W Henrichs
- 👤 Frank A Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:24
CPC Classifications
E; E05; E05D; E05D11/00; E05D11/10; E05D11/1014; E05D5/00; E05D5/02; E05D5/06; E05F; E05F1/00; E05F1/08; E05F1/10; E05F1/12; E05F1/1207; E05F1/1215; E05D11/1007; E05D2005/067
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) | 1972-09-29 | 1973-03-31 | 1973-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-29 | 1977-03-31 | 1977-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-29 | 1981-03-31 | 1981-09-30 | $7700.00 | Window Closed / Lapsed |