US2944497A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Work feeding attachments for sewing machines
Assignee: Singer Co
•
Filing: 1957-07-15
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Granted: 1960-07-12
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Expires: 1977-07-15
Abstract
No abstract record available.
Inventors
- 👤 Max L Waterman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:57
CPC Classifications
D; D05; D05B; D05B15/00; D05B15/02; D05B21/00; D05B21/002; D05B27/00; D05B27/02; D05B27/04
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) | 1963-07-12 | 1964-01-11 | 1964-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-12 | 1968-01-11 | 1968-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-12 | 1972-01-11 | 1972-07-12 | $7700.00 | Window Closed / Lapsed |