Patent US2989169A successfully refreshed from Google Patents.
US2989169A
Expired / Lapsed
US
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Conveyor mechanisms
Assignee: SERVICE CONVEYOR CO
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Filing: 1959-03-19
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Granted: 1961-06-20
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Expires: 1979-03-19
Abstract
No abstract record available.
Inventors
- 👤 David M Clapp
- 👤 James R Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:09
CPC Classifications
F; F27; F27B; F27B9/00; F27B9/14; F27B9/20; F27B9/24; F27B9/243; B; B65; B65G; B65G17/00; B65G17/06; B65G17/067; B65G17/10; B65G2201/00; B65G2201/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |