US2830670A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control of differentials for tractors
Assignee: MASSEY HARRIS FERGUSON Inc
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Filing: 1954-05-28
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Granted: 1958-04-15
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Expires: 1974-05-28
Abstract
No abstract record available.
Inventors
- 👤 Henry G Ferguson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:22
CPC Classifications
F; F16; F16H; F16H48/00; F16H48/20; F16H48/22; F16H48/30; F16H2048/204; F16H2048/305
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-14 | 1961-10-14 | 1962-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-14 | 1965-10-14 | 1966-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-14 | 1969-10-14 | 1970-04-15 | $7700.00 | Window Closed / Lapsed |