US1721069A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Knee control mechanism for portable electric sewing machines
Assignee: Singer Co
•
Filing: 1928-06-09
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Granted: 1929-07-16
•
Expires: 1948-06-09
Abstract
No abstract record available.
Inventors
- 👤 Daniel H Chason
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:07
CPC Classifications
D; D05; D05B; D05B69/00; D05B69/14; D05B69/18; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18888; Y10T74/20; Y10T74/20546
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) | 1932-07-15 | 1933-01-14 | 1933-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-07-15 | 1937-01-14 | 1937-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-07-15 | 1941-01-14 | 1941-07-16 | $7700.00 | Window Closed / Lapsed |