US3020893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motors for hydrostatic power transmission systems
Assignee: National Research Development Corp UK
•
Filing: 1959-06-23
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Granted: 1962-02-13
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Expires: 1979-06-23
Abstract
No abstract record available.
Inventors
- 👤 Hamblin Henry Joel
- 👤 Nation Harry James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:45
CPC Classifications
F; F03; F03C; F03C1/00; F03C1/22; F03C1/24; F03C1/2454; F16; F16H; F16H61/00; F16H61/38; F16H61/40; F16H61/42; F16H61/421
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US373259A
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US688598A
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US1507442A
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US1462874A
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US1989212A
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US2273900A
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US2457100A
Cited
US2871830A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-12 | 1965-08-14 | 1966-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-12 | 1969-08-14 | 1970-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-12 | 1973-08-14 | 1974-02-13 | $7700.00 | Window Closed / Lapsed |