US3390831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bistable valve structure
Assignee: Texas Gas Transmission Corp
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Filing: 1966-12-16
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Granted: 1968-07-02
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Expires: 1986-12-16
Abstract
No abstract record available.
Inventors
- 👤 Jr James B Eaton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:15
CPC Classifications
F; F04; F04B; F04B39/00; F04B39/10; F04B39/1013
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-02 | 1972-01-01 | 1972-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-02 | 1976-01-01 | 1976-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-02 | 1980-01-01 | 1980-07-02 | $7700.00 | Window Closed / Lapsed |