US2440031A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drop feed mechanism for sewing machines
Assignee: Individual
•
Filing: 1945-09-15
•
Granted: 1948-04-20
•
Expires: 1965-09-15
Abstract
No abstract record available.
Inventors
- 👤 George R Wainwright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:44
CPC Classifications
D; D05; D05B; D05B27/00; D05B27/22; D05B73/00; D05B73/005
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-04-20 | 1951-10-20 | 1952-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-04-20 | 1955-10-20 | 1956-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-04-20 | 1959-10-20 | 1960-04-20 | $7700.00 | Window Closed / Lapsed |