Patent US3061871A successfully refreshed from Google Patents.
US3061871A
Expired / Lapsed
US
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Torsion bar hinge structure
Assignee: Whirlpool Corp
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Filing: 1960-09-14
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Granted: 1962-11-06
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Expires: 1980-09-14
Abstract
No abstract record available.
Inventors
- 👤 Donald F Swanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:21
CPC Classifications
E; E05; E05F; E05F1/00; E05F1/08; E05F1/10; E05F1/12; E05F1/123
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2602957A
Cited
US2871505A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-11-05 | 1966-05-07 | 1966-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-11-05 | 1970-05-07 | 1970-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-11-05 | 1974-05-07 | 1974-11-06 | $7700.00 | Window Closed / Lapsed |