US3398696A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary hydraulic machines
Assignee: Library and Archives Canada
•
Filing: 1966-06-06
•
Granted: 1968-08-27
•
Expires: 1986-06-06
Abstract
No abstract record available.
Inventors
- 👤 Robert S Sproule
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:50
CPC Classifications
F; F03; F03B; F03B11/00; F03B11/006; Y; Y02; Y02E; Y02E10/00; Y02E10/20
Claims Analysis
Total Claims: 0
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US3290883A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-27 | 1972-02-26 | 1972-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-27 | 1976-02-26 | 1976-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-27 | 1980-02-26 | 1980-08-27 | $7700.00 | Window Closed / Lapsed |