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US1935309A
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Spring-forming mechanism
Assignee: Wallace Barnes Co
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Filing: 1933-01-11
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Granted: 1933-11-14
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Expires: 1953-01-11
Abstract
No abstract record available.
Inventors
- 👤 William H Bleuel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:35
CPC Classifications
B; B21; B21F; B21F3/00; B21F3/02; B21F3/06; B21F11/00; B21F11/005; B21F3/10; B21F35/00; Y; Y10; Y10T; Y10T83/00; Y10T83/444
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) | 1936-11-13 | 1937-05-15 | 1937-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-11-13 | 1941-05-15 | 1941-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-11-13 | 1945-05-15 | 1945-11-14 | $7700.00 | Window Closed / Lapsed |