Patent US2423407A successfully refreshed from Google Patents.
US2423407A
Expired / Lapsed
US
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Idler roller for belt conveyors
Assignee: Individual
•
Filing: 1943-03-18
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Granted: 1947-07-01
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Expires: 1963-03-18
Abstract
No abstract record available.
Inventors
- 👤 Searles Amos
- 👤 Charles A Swartz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:38
CPC Classifications
B; B65; B65G; B65G39/00; B65G39/02; B65G39/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1487945A
Cited
US1576924A
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US1748100A
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US1803357A
Cited
GB481707A
Cited
US2169623A
Cited
US2169624A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-06-30 | 1950-12-30 | 1951-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-06-30 | 1954-12-30 | 1955-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-06-30 | 1958-12-30 | 1959-07-01 | $7700.00 | Window Closed / Lapsed |