US1971765A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spiral spring structure and method of making same
Assignee: LEGGETT AND PLATT SPRING BED M
•
Filing: 1933-02-08
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Granted: 1934-08-28
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Expires: 1953-02-08
Abstract
No abstract record available.
Inventors
- 👤 Fred C Bouser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:54
CPC Classifications
B; B21; B21F; B21F33/00; B21F33/04; Y; Y10; Y10T; Y10T29/00; Y10T29/48; Y10T29/49; Y10T29/49609; Y10T29/49613; Y10T29/49826; Y10T29/49908; Y10T29/49915; Y10T29/49922
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1937-08-27 | 1938-02-26 | 1938-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-08-27 | 1942-02-26 | 1942-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-08-27 | 1946-02-26 | 1946-08-28 | $7700.00 | Window Closed / Lapsed |