US3448577A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic drive system
Assignee: Individual
•
Filing: 1968-05-27
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Granted: 1969-06-10
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Expires: 1988-05-27
Abstract
No abstract record available.
Inventors
- 👤 John M Crawford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:10
CPC Classifications
F; F16; F16H; F16H61/00; F16H61/38; F16H61/40; F16H61/44; F16H61/448; B; B60; B60K; B60K17/00; B60K17/04; B60K17/10; F16H39/00; F16H39/02; F16H61/4043; F16H61/4148
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) | 1972-06-09 | 1972-12-09 | 1973-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-09 | 1976-12-09 | 1977-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-09 | 1980-12-09 | 1981-06-10 | $7700.00 | Window Closed / Lapsed |