Patent US2660227A successfully refreshed from Google Patents.
US2660227A
Expired / Lapsed
US
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Spring construction
Assignee: American Metal Products Co
•
Filing: 1949-06-18
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Granted: 1953-11-24
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Expires: 1969-06-18
Abstract
No abstract record available.
Inventors
- 👤 Floyd S Laurie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:50
CPC Classifications
A; A47; A47C; A47C7/00; A47C7/02; A47C7/28; A47C7/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US133102A
Cited
US177613A
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US282746A
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US2214136A
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US2251049A
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US2257367A
Cited
GB586277A
Cited
US2358395A
Cited
US2548968A
Cited
US2526183A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-23 | 1957-05-25 | 1957-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-23 | 1961-05-25 | 1961-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-23 | 1965-05-25 | 1965-11-24 | $7700.00 | Window Closed / Lapsed |