Patent US2673598A successfully refreshed from Google Patents.
US2673598A
Expired / Lapsed
US
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Spring for producing soft edges for sinuous springs
Assignee: No Sag Spring Co
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Filing: 1950-05-26
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Granted: 1954-03-30
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Expires: 1970-05-26
Abstract
No abstract record available.
Inventors
- 👤 George H Grattan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:20
CPC Classifications
A; A47; A47C; A47C7/00; A47C7/02; A47C7/28; A47C7/287
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2124655A
Cited
US2235554A
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US2392254A
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US2384191A
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US2341419A
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US2551800A
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US2526184A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-29 | 1957-09-28 | 1958-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-29 | 1961-09-28 | 1962-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-29 | 1965-09-28 | 1966-03-30 | $7700.00 | Window Closed / Lapsed |