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Patent US3525273A successfully refreshed from Google Patents.
US3525273A
Expired / Lapsed
US
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Differential drive mechanism
Assignee: THOMAS MACHINE Inc
•
Filing: 1968-01-23
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Granted: 1970-08-25
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Expires: 1988-01-23
Abstract
No abstract record available.
Inventors
- 👤 Raymond G Brownstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:23
CPC Classifications
F; F16; F16H; F16H3/00; F16H3/44; F16H2720/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US694724A
Cited
US1406627A
Cited
US2309559A
Cited
US2577604A
Cited
US2730182A
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US3365981A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-24 | 1974-02-23 | 1974-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-24 | 1978-02-23 | 1978-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-24 | 1982-02-23 | 1982-08-25 | $7700.00 | Window Closed / Lapsed |