US1525643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thread-tension mechanism for sewing machines
Assignee: Singer Co
•
Filing: 1922-12-02
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Granted: 1925-02-10
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Expires: 1942-12-02
Abstract
No abstract record available.
Inventors
- 👤 Albert F Fifield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:02
CPC Classifications
D; D05; D05B; D05B47/00
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) | 1928-02-10 | 1928-08-11 | 1929-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1932-02-10 | 1932-08-11 | 1933-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1936-02-10 | 1936-08-11 | 1937-02-10 | $7700.00 | Window Closed / Lapsed |