US3407674A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drive chain tensioning apparatus
Assignee: FMC Corp
•
Filing: 1966-07-08
•
Granted: 1968-10-29
•
Expires: 1986-07-08
Abstract
No abstract record available.
Inventors
- 👤 Bert L Pearce
- 👤 Clarence E Kelch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:34
CPC Classifications
F; F16; F16H; F16H7/00; F16H7/08; F16H7/0848; F16H2007/0802; F16H2007/0806; F16H2007/0851; F16H2007/0853; F16H2007/0863; F16H2007/0872; F16H2007/0889; F16H2007/0891
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1673762A
Cited
GB696586A
Cited
DE958070C
Cited
GB831390A
Cited
US2963918A
Cited
US3007344A
Cited
US3232129A
Cited
GB1013876A
Cited
US3252347A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-29 | 1972-04-29 | 1972-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-29 | 1976-04-29 | 1976-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-29 | 1980-04-29 | 1980-10-29 | $7700.00 | Window Closed / Lapsed |