US2020658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine and method for manufacturing bolts
Assignee: National Machinery Co
•
Filing: 1932-10-22
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Granted: 1935-11-12
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Expires: 1952-10-22
Abstract
No abstract record available.
Inventors
- 👤 Earl R Frost
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:14
CPC Classifications
B; B21; B21J; B21J9/00; B21J9/02; B21J9/06; B21H; B21H3/00; B21H3/02; B21H3/06; B21H9/00; B21H9/02; B21K; B21K1/00; B21K1/44; B21K1/46; B21K1/466; Y; Y10; Y10T; Y10T29/00; Y10T29/51; Y10T29/5116; Y10T29/5121
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) | 1938-11-11 | 1939-05-13 | 1939-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-11-11 | 1943-05-13 | 1943-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-11-11 | 1947-05-13 | 1947-11-12 | $7700.00 | Window Closed / Lapsed |