US2663169A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manipulation of nitrogen-contaminated natural gases
Assignee: Individual
•
Filing: 1949-08-04
•
Granted: 1953-12-22
•
Expires: 1969-08-04
Abstract
No abstract record available.
Inventors
- 👤 Lee S Twomey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:33
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/0228; F25J3/0257; F25J3/0204; F25J3/0209; F25J3/0233; F25J2200/00; F25J2200/02; F25J2200/50; F25J2200/76; F25J2270/00; F25J2270/08; F25J2270/12; F25J2270/42; F25J2270/60; Y; Y10; Y10S; Y10S62/00; Y10S62/927
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
IN THE METHOD OF SEPARATING USEFUL GROUPS OF COMPONENTS FROM NITROGEN-CONTAMINATED NATURAL GAS CONTAINING PROPANE AND HEAVIER HYDROCARBONS WHICH COMPRISES: PARTIALLY LIQUEFYING SAID GAS AND PARTING A LIQUID LEAN IN NITROGEN FROM A VAPOR RICH IN NITROGEN; FRACTIONATING SAID VAPOR AND SEPARATING NITROGEN FROM HYDROCARBONS; PARTIALLY VAPORIZING SAID LIQUID IN A PLURALITY OF STAGES AND FLASHING OFF A PROPANE-LEAN VAPOR IN EACH SAID STAGE, AND WITHDRAWING FROM THE LAST OF SAID STAGES A LIQUID ENRICHED IN PROPANE AND HEAVIER HYDROCARBONS.
Claim 2
Dependent Claim
80 words
IN THE METHOD OF SEPARATING USEFUL GROUPS OF COMPONENTS FROM NITROGEN-CONTAMINATED NATURAL GAS CONTAINING PROPANE AND HEAVIER HYDROCARBONS WHICH COMPRISES: PARTIALLY LIQUEFYING SAID GAS AND PARTING A LIQUID LEAN IN NITROGEN FROM A VAPOR RICH IN NITROGEN; FRACTIONATING SAID VAPOR AND SEPARATING NITROGEN FROM HYDROCARBONS; PARTIALLY VAPORIZING SAID LIQUID IN A PLURALITY OF STAGES AND FLASHING OFF A PROPANE-LEAN VAPOR IN EACH SAID STAGE, AND WITHDRAWING FROM THE LAST OF SAID STAGES A LIQUID ENRICHED IN PROPANE AND HEAVIER HYDROCARBONS.
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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) | 1956-12-21 | 1957-06-22 | 1957-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-21 | 1961-06-22 | 1961-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-21 | 1965-06-22 | 1965-12-22 | $7700.00 | Window Closed / Lapsed |