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Patent US2305730A successfully refreshed from Google Patents.
US2305730A
Expired / Lapsed
US
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Pulley structure
Assignee: Individual
•
Filing: 1940-01-20
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Granted: 1942-12-22
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Expires: 1960-01-20
Abstract
No abstract record available.
Inventors
- 👤 James J O'brien
- 👤 Strad James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:10
CPC Classifications
F; F16; F16H; F16H55/00; F16H55/32; F16H55/36; F16H55/38; B; B65; B65G; B65G23/00; B65G2812/00; B65G2812/02; B65G2812/02128; B65G2812/02138; B65G2812/02148
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) | 1945-12-21 | 1946-06-22 | 1946-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-12-21 | 1950-06-22 | 1950-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-12-21 | 1954-06-22 | 1954-12-22 | $7700.00 | Window Closed / Lapsed |