Patent US2647409A successfully refreshed from Google Patents.
US2647409A
Expired / Lapsed
US
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Nonslip pulley drive
Assignee: General Electric Co
•
Filing: 1948-06-09
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Granted: 1953-08-04
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Expires: 1968-06-09
Abstract
No abstract record available.
Inventors
- 👤 Donald B Keim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:41
CPC Classifications
F; F16; F16H; F16H7/00; F16H7/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US241494A
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US607986A
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US1156120A
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US1217270A
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US1488618A
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US1645552A
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US1828136A
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US2297619A
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US2586567A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-03 | 1957-02-02 | 1957-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-03 | 1961-02-02 | 1961-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-03 | 1965-02-02 | 1965-08-04 | $7700.00 | Window Closed / Lapsed |