Patent US2139936A successfully refreshed from Google Patents.
US2139936A
Expired / Lapsed
US
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Machine for making bolts
Assignee: National Machinery Co
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Filing: 1937-03-31
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Granted: 1938-12-13
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Expires: 1957-03-31
Abstract
No abstract record available.
Inventors
- 👤 William L Clouse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:49
CPC Classifications
B; B21; B21J; B21J13/00; B21J13/08; B21J9/00; B21J9/02; B21J9/06; B21K; B21K27/00; B21K27/02; B21K27/06; B23; B23D; B23D21/00
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) | 1941-12-12 | 1942-06-13 | 1942-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-12-12 | 1946-06-13 | 1946-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-12-12 | 1950-06-13 | 1950-12-13 | $7700.00 | Window Closed / Lapsed |