US2706487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Release valves
Assignee: Oil States Industries Inc
•
Filing: 1951-01-04
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Granted: 1955-04-19
•
Expires: 1971-01-04
Abstract
No abstract record available.
Inventors
- 👤 Wilson John Hart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:04
CPC Classifications
F; F15; F15B; F15B11/00; F15B11/06; B; B60; B60T; B60T15/00; B60T15/02; B60T15/36; B60T15/42; G; G05; G05D; G05D16/00; G05D16/04; G05D16/10; G05D16/101; G05D16/109; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2544
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2371293A
Cited
US1697352A
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US2002672A
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US2252923A
Cited
US2393076A
Cited
US2385733A
Cited
US2513976A
Cited
US2574851A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-04-18 | 1958-10-18 | 1959-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-04-18 | 1962-10-18 | 1963-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-04-18 | 1966-10-18 | 1967-04-19 | $7700.00 | Window Closed / Lapsed |