US2951539A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid positioning mechanism
Assignee: Individual
•
Filing: 1954-06-03
•
Granted: 1960-09-06
•
Expires: 1974-06-03
Abstract
No abstract record available.
Inventors
- 👤 Billy C Malone
- 👤 George C Conover
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:44
CPC Classifications
E; E21; E21B; E21B23/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US228555A
Cited
US1551372A
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US763285A
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US1141310A
Cited
US1584884A
Cited
US1567515A
Cited
US2064527A
Cited
US2178540A
Cited
US2227731A
Cited
US2577068A
Cited
US2737246A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-06 | 1964-03-07 | 1964-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-06 | 1968-03-07 | 1968-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-06 | 1972-03-07 | 1972-09-06 | $7700.00 | Window Closed / Lapsed |