US2609226A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Straight bore hydraulic knuckle
Assignee: Individual
•
Filing: 1947-03-08
•
Granted: 1952-09-02
•
Expires: 1967-03-08
Abstract
No abstract record available.
Inventors
- 👤 Clarence P Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:12
CPC Classifications
E; E21; E21B; E21B31/00; E21B31/12; E21B31/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US218052A
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US586841A
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US1696378A
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US1718771A
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US1800490A
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US2169502A
Cited
US2242279A
Cited
US2333802A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-09-02 | 1956-03-03 | 1956-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-02 | 1960-03-03 | 1960-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-02 | 1964-03-03 | 1964-09-02 | $7700.00 | Window Closed / Lapsed |