US2984222A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Constant work output rotary hydraulic device
Assignee: Whiting Corp
•
Filing: 1957-05-08
•
Granted: 1961-05-16
•
Expires: 1977-05-08
Abstract
No abstract record available.
Inventors
- 👤 Fred T Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:57
CPC Classifications
F; F01; F01B; F01B15/00; F01B15/04; F01B15/06; F01B15/065; F01B1/00; F01B1/06; F01B1/0675
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US861801A
Cited
US1229076A
Cited
US1964245A
Cited
US2279645A
Cited
US2441797A
Cited
US2448104A
Cited
US2811931A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-15 | 1964-11-14 | 1965-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-15 | 1968-11-14 | 1969-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-15 | 1972-11-14 | 1973-05-16 | $7700.00 | Window Closed / Lapsed |