US2426636A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sewing machine
Assignee: WILLIAM R DONALDSON
•
Filing: 1943-02-02
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Granted: 1947-09-02
•
Expires: 1963-02-02
Abstract
No abstract record available.
Inventors
- 👤 William R Donaldson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:57
CPC Classifications
D; D05; D05B; D05B1/00; D05B1/08; D05B1/10; D05B73/00; D05B73/04; D05B73/12; D05B85/00; D05B85/006; D05D; D05D2203/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-09-01 | 1951-03-03 | 1951-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-09-01 | 1955-03-03 | 1955-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-09-01 | 1959-03-03 | 1959-09-02 | $7700.00 | Window Closed / Lapsed |