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Patent US2720764A successfully refreshed from Google Patents.
US2720764A
Expired / Lapsed
US
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Flexible power transmission
Assignee: Individual
•
Filing: 1950-11-03
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Granted: 1955-10-18
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Expires: 1970-11-03
Abstract
No abstract record available.
Inventors
- 👤 Landrum Porter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:46
CPC Classifications
F; F16; F16H; F16H55/00; F16H55/02; F16H55/30; B; B62; B62D; B62D55/00; B62D55/08; B62D55/096; B62D55/0963; F16D; F16D3/00; F16D3/50; F16D3/76; F16D2300/00; F16D2300/02; F16D2300/021; F16D2300/0212
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2234443A
Cited
US2233539A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-17 | 1959-04-18 | 1959-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-17 | 1963-04-18 | 1963-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-17 | 1967-04-18 | 1967-10-18 | $7700.00 | Window Closed / Lapsed |