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Patent US2723686A successfully refreshed from Google Patents.
US2723686A
Expired / Lapsed
US
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Safety conveyor drive
Assignee: Warner and Swasey Co
•
Filing: 1952-01-16
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Granted: 1955-11-15
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Expires: 1972-01-16
Abstract
No abstract record available.
Inventors
- 👤 Nicholas P Darash
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:50
CPC Classifications
D; D03; D03D; D03D47/00; D03D47/12; D03D47/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2099627A
Cited
US2538798A
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US1812480A
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US1932362A
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US1938720A
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US2055228A
Cited
US2205370A
Cited
US2639732A
Cited
CH254212A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-11-14 | 1959-05-16 | 1959-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-14 | 1963-05-16 | 1963-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-14 | 1967-05-16 | 1967-11-15 | $7700.00 | Window Closed / Lapsed |