Patent US2836137A successfully refreshed from Google Patents.
US2836137A
Expired / Lapsed
US
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Presser foot lifter and spring tensioning mechanism for a sewing machine
Assignee: White Sewing Machine Corp
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Filing: 1955-07-21
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Granted: 1958-05-27
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Expires: 1975-07-21
Abstract
No abstract record available.
Inventors
- 👤 Waldemar A Ayres
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:21
CPC Classifications
D; D05; D05B; D05B29/00; D05B29/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US286662A
Cited
US2139426A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-26 | 1961-11-25 | 1962-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-26 | 1965-11-25 | 1966-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-26 | 1969-11-25 | 1970-05-27 | $7700.00 | Window Closed / Lapsed |