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US1556829A
Expired / Lapsed
US
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Interlocking mechanism
Assignee: Sullivan Machinery Co
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Filing: 1920-05-28
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Granted: 1925-10-13
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Expires: 1940-05-28
Abstract
No abstract record available.
Inventors
- 👤 Charles W Wyman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:26
CPC Classifications
H; H01; H01H; H01H9/00; H01H9/10; H01H9/104
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) | 1928-10-12 | 1929-04-13 | 1929-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1932-10-12 | 1933-04-13 | 1933-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1936-10-12 | 1937-04-13 | 1937-10-13 | $7700.00 | Window Closed / Lapsed |