US4249387A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigeration of liquefied petroleum gas storage with retention of light ends
Assignee: Phillips Petroleum Co
•
Filing: 1979-06-27
•
Granted: 1981-02-10
•
Expires: 1999-06-27
Abstract
Abstract Vapor vented from a liquefied petroleum gas storage container, vessel, or pit is compressed, cooled, and condensed. The condensate is admixed with liquefied petroleum gas taken from said storage and the admixture thus obtained is returned to said storage.
Inventors
- 👤 Ralph P. Crowley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:31
CPC Classifications
F; F25; F25J; F25J1/00; F25J1/02; F25J1/0203; F25J1/0208; F25J1/0002; F25J1/0022; F25J1/0025; F25J1/003; F25J1/0032; F25J1/0045; F25J2205/00; F25J2205/90; F25J2215/00; F25J2215/64; F25J2220/00; F25J2220/60; F25J2220/62; F25J2235/00; F25J2235/60; F25J2245/00; F25J2245/02; F25J2270/00; F25J2270/90; F25J2290/00; F25J2290/62
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
51 words
A method for refrigerating a liquefied petroleum gas in storage which comprises taking vapor from vapor space in said storage, compressing the same, cooling the same, thus forming a condensate, admixing condensate thus obtained with liquefied petroleum gas taken from said storage and passing the admixture thus obtained into said storage.
Claim 2
Independent Claim
51 words
A method for refrigerating a liquefied petroleum gas in storage which comprises taking vapor from vapor space in said storage, compressing the same, cooling the same, thus forming a condensate, admixing condensate thus obtained with liquefied petroleum gas taken from said storage and passing the admixture thus obtained into said storage.
Claim 3
Dependent Claim
23 words
A method according to claim 1 wherein the admixture is introduced into a top portion of said storage above the liquid level therein.
Claim 4
Independent Claim
81 words
An apparatus comprising in combination a storage vessel, container, or pit, means for feeding to said pit a liquefied petroleum gas, means for taking liquefied petroleum gas from said pit, means for removing vapor from the vapor space in said storage pit, means for compressing, condensing, and receiving condensate, means for returning said condensate to said storage and means for admixing with said condensate prior to its return to said storage, a portion of liquefied petroleum gas taken from said storage.
Claim 5
Independent Claim
81 words
An apparatus comprising in combination a storage vessel, container, or pit, means for feeding to said pit a liquefied petroleum gas, means for taking liquefied petroleum gas from said pit, means for removing vapor from the vapor space in said storage pit, means for compressing, condensing, and receiving condensate, means for returning said condensate to said storage and means for admixing with said condensate prior to its return to said storage, a portion of liquefied petroleum gas taken from said storage.
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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) | 1984-02-10 | 1984-08-11 | 1985-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-10 | 1988-08-11 | 1989-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-10 | 1992-08-11 | 1993-02-10 | $7700.00 | Window Closed / Lapsed |