US3187485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of hydrogen by scrubbing with nitrogen at high pressures
Assignee: Foster Wheeler Inc
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Filing: 1961-12-13
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Granted: 1965-06-08
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Expires: 1981-12-13
Abstract
No abstract record available.
Inventors
- 👤 Paul R Konz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:26
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/0228; F25J3/0252; C; C01; C01B; C01B3/00; C01B3/50; C01B3/506; C01B3/52; C10; C10K; C10K1/00; C10K1/08; C10K1/16; C10K1/165; F25J3/0204; F25J3/0223; C01B2203/00; C01B2203/04; C01B2203/0415; C01B2203/046; C01B2203/0465; C01B2203/047; C01B2203/0475; C01B2203/048; C01B2203/0495; F25J2205/00; F25J2205/02; F25J2205/30; F25J2210/00; F25J2210/42; F25J2235/00; F25J2235/42; F25J2245/00; F25J2245/02; F25J2270/00; F25J2270/14; F25J2270/42; Y; Y02; Y02P; Y02P20/00; Y02P20/151; Y10; Y10S; Y10S62/00; Y10S62/931; Y10S62/934
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A PROCESS FOR PURIFYING A GASEOUS CONSISTING ESSENTIALLY OF HYDROGEN AND SMALL AMOUNTS OF A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF CARBON MONOXIDE, METHANE, ARGON AND MIXTURES THEREOF COMPRISING THE STEPS OF CONTINUOUSLY PROVIDING A SOURCE OF SUBSTANTIALLY PURE NITROGEN GAS, COMPRESSING AND LIQUIFYING SAID NITROGEN GAS, CONTINUOUSLY FEEDING THE PURE LIQUID NITROGEN INTO CONTRACT WITH SAID GASEOUS STREAM AT A PRESSURE FROM 500 P.S.I.A. TO 1600 P.S.I.A. AT A TEMPERATURE IN THE RANGE OF -310*F. TO -344*F. ABSORBING SAID SUBSTANCE FROM THE STREAM, CONTINUOUSLY DISPOSING OF THE LIQUID NITROGEN AND ABSORBED SUBSTANCE TO WASTE FOLLOWING SAID CONTACT.
Claim 2
Dependent Claim
99 words
A PROCESS FOR PURIFYING A GASEOUS CONSISTING ESSENTIALLY OF HYDROGEN AND SMALL AMOUNTS OF A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF CARBON MONOXIDE, METHANE, ARGON AND MIXTURES THEREOF COMPRISING THE STEPS OF CONTINUOUSLY PROVIDING A SOURCE OF SUBSTANTIALLY PURE NITROGEN GAS, COMPRESSING AND LIQUIFYING SAID NITROGEN GAS, CONTINUOUSLY FEEDING THE PURE LIQUID NITROGEN INTO CONTRACT WITH SAID GASEOUS STREAM AT A PRESSURE FROM 500 P.S.I.A. TO 1600 P.S.I.A. AT A TEMPERATURE IN THE RANGE OF -310*F. TO -344*F. ABSORBING SAID SUBSTANCE FROM THE STREAM, CONTINUOUSLY DISPOSING OF THE LIQUID NITROGEN AND ABSORBED SUBSTANCE TO WASTE FOLLOWING SAID CONTACT.
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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) | 1968-06-07 | 1968-12-07 | 1969-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-07 | 1972-12-07 | 1973-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-07 | 1976-12-07 | 1977-06-08 | $7700.00 | Window Closed / Lapsed |