US3548606A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Serial incremental refrigerant expansion for gas liquefaction
Assignee: Phillips Petroleum Co
•
Filing: 1968-07-08
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Granted: 1970-12-22
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Expires: 1988-07-08
Abstract
No abstract record available.
Inventors
- 👤 Richard D Kuerston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:42
CPC Classifications
F; F25; F25J; F25J5/00; F25J5/002; F25J1/00; F25J1/0002; F25J1/0022; F25J1/003; F25J1/0047; F25J1/0052; F25J1/006; F25J1/008; F25J1/0082; F25J1/0085; F25J1/0087; F25J1/02; F25J1/0203; F25J1/0207; F25J1/0243; F25J1/0279; F25J1/0292; F28; F28D; F28D7/00; F28D7/02; F28D7/024; F25J2220/00; F25J2220/60; F25J2220/62; Y; Y10; Y10S; Y10S62/00; Y10S62/902; Y10S62/903
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA652208A
Cited
US3020723A
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US2960837A
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US3144316A
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US3218816A
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US3342037A
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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) | 1973-12-21 | 1974-06-22 | 1974-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-21 | 1978-06-22 | 1978-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-21 | 1982-06-22 | 1982-12-22 | $7700.00 | Window Closed / Lapsed |