US2843219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removal of nitrogen from natural gas
Assignee: Canadian Patents and Development Ltd
•
Filing: 1957-01-22
•
Granted: 1958-07-15
•
Expires: 1977-01-22
Abstract
No abstract record available.
Inventors
- 👤 Henry W Habgood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:17
CPC Classifications
C; C01; C01B; C01B21/00; C01B21/04; C01B21/0405; C01B21/0433; C01B21/045; B; B01; B01D; B01D53/00; B01D53/02; C07; C07C; C07C7/00; C07C7/12; C07C7/13; B01D2253/00; B01D2253/10; B01D2253/116; B01D2256/00; B01D2256/24; B01D2256/245; B01D2257/00; B01D2257/10; B01D2257/102; C01B2210/00; C01B2210/0043; C01B2210/0068; C01B2210/007; Y; Y10; Y10S; Y10S95/00; Y10S95/90; Y10S95/902
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
A METHOD FOR THE REMOVAL OF NITROGEN FROM GASEOUS MIXTURES CONSISTING MAINLY OF METHANE, COMPRISING: CONTACTING THE GASEOUS MIXTURE WITH A SUITABLE MOLECULAR SIEVE IN WHICH THE INTERSTITIAL AND INTRACRYSTALLINE PASSAGES ARE SUCH THAT THE RATIO OF THE RATE OF SORPTION TO PARTIAL PRESSURE IS INITIALLY GREATER FOR NITROGEN THAN FOR METHANE; REMOVING THE GASEOUS MIXTURE FROM CONTACT WITH SAID MOLECULAR SIEVE MATERIAL BEFORE THE PROPORTION OF SORBED METHANE TO SORBED NITROGEN EXCEEDS A PREDETERMINED VALUE AND BEFORE EQUILIBRIUM IS APPRAOCHED, AND RECOVERING AN UNSORBED FRACTION OF SAID GASEOUS MIXTURE WHICH IS RICH IN METHANE AND WHICH CONTAINS A SUBSTANTIALLY REDUCED PROPORTION OF NITROGEN.
Claim 2
Independent Claim
104 words
A METHOD FOR THE REMOVAL OF NITROGEN FROM GASEOUS MIXTURES CONSISTING MAINLY OF METHANE, COMPRISING: CONTACTING THE GASEOUS MIXTURE WITH A SUITABLE MOLECULAR SIEVE IN WHICH THE INTERSTITIAL AND INTRACRYSTALLINE PASSAGES ARE SUCH THAT THE RATIO OF THE RATE OF SORPTION TO PARTIAL PRESSURE IS INITIALLY GREATER FOR NITROGEN THAN FOR METHANE; REMOVING THE GASEOUS MIXTURE FROM CONTACT WITH SAID MOLECULAR SIEVE MATERIAL BEFORE THE PROPORTION OF SORBED METHANE TO SORBED NITROGEN EXCEEDS A PREDETERMINED VALUE AND BEFORE EQUILIBRIUM IS APPRAOCHED, AND RECOVERING AN UNSORBED FRACTION OF SAID GASEOUS MIXTURE WHICH IS RICH IN METHANE AND WHICH CONTAINS A SUBSTANTIALLY REDUCED PROPORTION OF NITROGEN.
References Cited (Backward Citations)
US2254799A
Cited
US2306610A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-14 | 1962-01-13 | 1962-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-14 | 1966-01-13 | 1966-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-14 | 1970-01-13 | 1970-07-15 | $7700.00 | Window Closed / Lapsed |