US3485441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetically biased compressor check valves
Assignee: Texas Gas Transmission Corp
•
Filing: 1966-09-28
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Granted: 1969-12-23
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Expires: 1986-09-28
Abstract
No abstract record available.
Inventors
- 👤 James B Eaton Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:29
CPC Classifications
F; F04; F04B; F04B3/00; F04B39/00; F04B39/10; F04B39/1013; F04B5/00; F04B5/02; F16; F16K; F16K15/00; F16K15/02; F16K15/021; F16K31/00; F16K31/02; F16K31/06; F16K31/08; F16K31/084; F16K2200/00; F16K2200/30; F16K2200/305; F16K2200/3051; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7838; Y10T137/7839; Y10T137/7869; Y10T137/7904; Y10T137/7905
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2599898A
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US2646071A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-22 | 1973-06-23 | 1973-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-22 | 1977-06-23 | 1977-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-22 | 1981-06-23 | 1981-12-23 | $7700.00 | Window Closed / Lapsed |