Patent US2641758A successfully refreshed from Google Patents.
US2641758A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring coil for cushions, mattresses, and the like
Assignee: SPRING UNIT DEV CO
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Filing: 1948-06-24
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Granted: 1953-06-09
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Expires: 1968-06-24
Abstract
No abstract record available.
Inventors
- 👤 David I Levine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:09
CPC Classifications
A; A47; A47C; A47C23/00; A47C23/04; A47C23/043; A47C23/0438; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49609; Y10T29/49613
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US390514A
Cited
GB165577A
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US1451936A
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US1610201A
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US1933014A
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US1964950A
Cited
US2017032A
Cited
US2116796A
Cited
US2182069A
Cited
US2430899A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-08 | 1956-12-08 | 1957-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-08 | 1960-12-08 | 1961-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-08 | 1964-12-08 | 1965-06-09 | $7700.00 | Window Closed / Lapsed |