US2976831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sewing machines
Assignee: Singer Co
•
Filing: 1956-09-14
•
Granted: 1961-03-28
•
Expires: 1976-09-14
Abstract
No abstract record available.
Inventors
- 👤 Hacklander Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:40
CPC Classifications
D; D05; D05B; D05B73/00; D05B71/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US722014A
Cited
US1248827A
Cited
US1387139A
Cited
US1737395A
Cited
US1843188A
Cited
US2102202A
Cited
US2119316A
Cited
US2199174A
Cited
US2189657A
Cited
US2193754A
Cited
US2242962A
Cited
US2325643A
Cited
US2401216A
Cited
US2482079A
Cited
US2670703A
Cited
US2718859A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-27 | 1964-09-26 | 1965-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-27 | 1968-09-26 | 1969-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-27 | 1972-09-26 | 1973-03-28 | $7700.00 | Window Closed / Lapsed |