Patent US3512368A successfully refreshed from Google Patents.
US3512368A
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Helium and nitrogen containing fuel product recovery
Assignee: Phillips Petroleum Co
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Filing: 1968-01-02
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Granted: 1970-05-19
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Expires: 1988-01-02
Abstract
No abstract record available.
Inventors
- 👤 Ernest A Harper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:44
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/0228; F25J3/0233; F25J3/0204; F25J3/0209; F25J3/0257; F25J3/028; F25J3/029; F25J3/08; F25J2200/00; F25J2200/02; F25J2200/76; F25J2205/00; F25J2205/02; F25J2205/04; F25J2215/00; F25J2215/30; F25J2215/42; F25J2215/44; F25J2220/00; F25J2220/60; F25J2220/64; F25J2270/00; F25J2270/42; Y; Y10; Y10S; Y10S62/00; Y10S62/927
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) | 1973-05-18 | 1973-11-17 | 1974-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-18 | 1977-11-17 | 1978-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-18 | 1981-11-17 | 1982-05-19 | $7700.00 | Window Closed / Lapsed |