Patent US4235601A successfully refreshed from Google Patents.
Patent US2138776A successfully refreshed from Google Patents.
US2138776A
Expired / Lapsed
US
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Punch mechanism for buttonholetype sewing machines
Assignee: Singer Co
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Filing: 1937-09-17
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Granted: 1938-11-29
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Expires: 1957-09-17
Abstract
No abstract record available.
Inventors
- 👤 Alfred R Wood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:10
CPC Classifications
D; D05; D05B; D05B37/00; D05B37/02; D05D; D05D2305/00; D05D2305/50; Y; Y10; Y10T; Y10T83/00; Y10T83/202; Y10T83/2092; Y10T83/2181
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1941-11-28 | 1942-05-30 | 1942-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-11-28 | 1946-05-30 | 1946-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-11-28 | 1950-05-30 | 1950-11-29 | $7700.00 | Window Closed / Lapsed |