Patent US3397138A successfully refreshed from Google Patents.
US3397138A
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Gas separation employing work expansion of feed and fractionator overhead
Assignee: Warren Petroleum Corp
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Filing: 1965-12-02
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Granted: 1968-08-13
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Expires: 1985-12-02
Abstract
No abstract record available.
Inventors
- 👤 Kenneth H Bacon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:22
CPC Classifications
C; C10; C10G; C10G5/00; C10G5/06; F; F25; F25J; F25J3/00; F25J3/02; F25J3/0204; F25J3/0209; F25J3/0228; F25J3/0233; F25J3/0238; F25J2200/00; F25J2200/74; F25J2205/00; F25J2205/02; F25J2205/04; F25J2230/00; F25J2230/20; F25J2230/60; F25J2240/00; F25J2240/02; F25J2270/00; F25J2270/04; F25J2270/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2608070A
Cited
US2658360A
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US2716332A
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US2915882A
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US3205669A
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US3246478A
Cited
US3316725A
Cited
US3292381A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-13 | 1972-02-12 | 1972-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-13 | 1976-02-12 | 1976-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-13 | 1980-02-12 | 1980-08-13 | $7700.00 | Window Closed / Lapsed |