US2982226A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valves
Assignee: Individual
•
Filing: 1956-06-01
•
Granted: 1961-05-02
•
Expires: 1976-06-01
Abstract
No abstract record available.
Inventors
- 👤 Clifford M Peters
- 👤 Robert W Dinning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:43
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/12; E21B43/121; E21B43/122; E21B43/123
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2339487A
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USRE24015E
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US2731977A
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US2314869A
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US2629335A
Cited
US2642811A
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US2620741A
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US2620740A
Cited
US2691383A
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US2725014A
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US2698024A
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US2797700A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-01 | 1964-10-31 | 1965-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-01 | 1968-10-31 | 1969-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-01 | 1972-10-31 | 1973-05-02 | $7700.00 | Window Closed / Lapsed |