Patent US2690060A successfully refreshed from Google Patents.
US2690060A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fractional distillation
Assignee: Phillips Petroleum Co
•
Filing: 1949-08-22
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Granted: 1954-09-28
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Expires: 1969-08-22
Abstract
No abstract record available.
Inventors
- 👤 Harold R Legatski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:04
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/0204; F25J3/0209; F25J3/0228; F25J3/0233; F25J3/0257; F25J3/0295; F25J5/00; F25J5/002; F25J5/007; F25J2200/00; F25J2200/80; F25J2200/90; F25J2235/00; F25J2235/60; F25J2290/00; F25J2290/40; Y; Y10; Y10S; Y10S62/00; Y10S62/902; Y10S62/903; Y10S62/905; Y10S62/926
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
A METHOD FOR SEPARATING NITROGEN FROM ADMIXTURE WITH METHANE COMPRISING INTRODUCING A FLUID STREAM OF SAID ADMIXTURE AT ITS DEW POINT TEMPERATURE INTO AN ELONGATED VERTICALLY DISPOSED SEPARATION ZONE AT A POINT INTERMEDIATE THE ENDS THEREOF, MAINTAINING DOWNWARD FLOWING THIN FILMS OF LIQUID REFLUX THROUGHOUT THE LENGTH OF SAID ZONE, MAINTAINING AN UNINTERRUPTED UPWARD FLOWING CURRENT OF VAPOR CONTINUOUSLY IN CONTACT WITH SAID DOWNWARD FLOWING THIN FILMS OF LIQUID REFLUX, MAINTAINING THAT PORTION OF SAID SEPARATION ZONE ABOVE THE FEED INLET POINT AT TEMPERATURES BELOW SAID DEW POINT, MAINTAINING THAT PORTION OF SAID SEPARATION ZONE BELOW THE FEED INLET POINT AT TEMPERATURES ABOVE THE BUBBLE POINT OF SAID FEED MIXTURE, WITHDRAWING AN OVERHEAD PRODUCT COM-
Claim 2
Independent Claim
115 words
A METHOD FOR SEPARATING NITROGEN FROM ADMIXTURE WITH METHANE COMPRISING INTRODUCING A FLUID STREAM OF SAID ADMIXTURE AT ITS DEW POINT TEMPERATURE INTO AN ELONGATED VERTICALLY DISPOSED SEPARATION ZONE AT A POINT INTERMEDIATE THE ENDS THEREOF, MAINTAINING DOWNWARD FLOWING THIN FILMS OF LIQUID REFLUX THROUGHOUT THE LENGTH OF SAID ZONE, MAINTAINING AN UNINTERRUPTED UPWARD FLOWING CURRENT OF VAPOR CONTINUOUSLY IN CONTACT WITH SAID DOWNWARD FLOWING THIN FILMS OF LIQUID REFLUX, MAINTAINING THAT PORTION OF SAID SEPARATION ZONE ABOVE THE FEED INLET POINT AT TEMPERATURES BELOW SAID DEW POINT, MAINTAINING THAT PORTION OF SAID SEPARATION ZONE BELOW THE FEED INLET POINT AT TEMPERATURES ABOVE THE BUBBLE POINT OF SAID FEED MIXTURE, WITHDRAWING AN OVERHEAD PRODUCT COM-
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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) | 1957-09-27 | 1958-03-29 | 1958-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-27 | 1962-03-29 | 1962-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-27 | 1966-03-29 | 1966-09-28 | $7700.00 | Window Closed / Lapsed |