Patent US1914976A successfully refreshed from Google Patents.
US1914976A
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US
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Machine for coiling helical forms
Assignee: Sleeper and Hartley Inc
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Filing: 1930-08-27
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Granted: 1933-06-20
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Expires: 1950-08-27
Abstract
No abstract record available.
Inventors
- 👤 Nigro Michel
- 👤 Percival S Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:25
CPC Classifications
B; B21; B21F; B21F3/00; B21F3/02; B21F3/06; Y; Y10; Y10S; Y10S264/00; Y10S264/40
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) | 1936-06-19 | 1936-12-19 | 1937-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-06-19 | 1940-12-19 | 1941-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-06-19 | 1944-12-19 | 1945-06-20 | $7700.00 | Window Closed / Lapsed |