US2548869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sewing machine
Assignee: Union Special Machine Co
•
Filing: 1947-03-27
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Granted: 1951-04-17
•
Expires: 1967-03-27
Abstract
No abstract record available.
Inventors
- 👤 Norman V Christensen
- 👤 Clarence C Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:00
CPC Classifications
D; D05; D05B; D05B1/00; D05B1/02; D05B1/06; D05B57/00; D05B57/02; D05B73/00; D05B73/005; D05B73/04; D05B73/12
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) | 1954-04-16 | 1954-10-16 | 1955-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-16 | 1958-10-16 | 1959-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-16 | 1962-10-16 | 1963-04-17 | $7700.00 | Window Closed / Lapsed |