US3350844A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the separation or enrichment of gases
Assignee: General Electric Co
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Filing: 1964-09-21
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Granted: 1967-11-07
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Expires: 1984-09-21
Abstract
No abstract record available.
Inventors
- 👤 Walter L Robb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:57
CPC Classifications
C; C01; C01B; C01B23/00; C01B23/001; C01B23/0036; C01B23/0042; C01B23/0047; B; B01; B01D; B01D53/00; B01D53/14; B01D53/18; B01D53/22; B01D53/228; B01D71/00; B01D71/06; B01D71/52; B01D71/522; B01D71/5223; C01B21/00; C01B21/04; C01B21/0405; C01B21/0433; C01B21/0438; C01B21/0444; C01B3/00; C01B3/50; C01B3/501; C01B3/503; C01B4/00; C01B2203/00; C01B2203/04; C01B2203/0405; C01B2203/0465; C01B2203/0475; C01B2210/00; C01B2210/0026; C01B2210/0029; C01B2210/0031; C01B2210/0043; C01B2210/0068
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
IN A PROCESS FOR THE SEPARATION OF A GAS SELECTED FROM THE CLASS CONSISTING OF HELIUM, HYDROGEN AND OXYGEN FROM A MIXTURE OF GASES CONTAINING AT LEAST ONE OF THE RECITED GASES, WHEREIN THE MIXTURE OF GASES IS BROUGHT INTO CONTACT WITH ONE SIDE OF A THIN, NON-POROUS POLYMERIC MEMBRANE, WHILE A REDUCED PARTIAL PRESSURE IN THE GAS TO BE SEPARATED IS MAINTAINED ON THE OPPOSITE SIDE OF SAID MEMBRANE AS COMPARED TO THE PARTIAL PRESSURE THEREOF ON SAID ONE SIDE, THE IMPROVEMENT COMPRISING THE USE OF A SOLID POLYARYLENE OXIDE FILM AS THE MEMBRANE, THE SOLID POLYARYLENE OXIDE FILM BEING COMPOSED OF RECURRING STRUCTURAL UNITS OF THE FORMULA
Claim 2
Dependent Claim
109 words
IN A PROCESS FOR THE SEPARATION OF A GAS SELECTED FROM THE CLASS CONSISTING OF HELIUM, HYDROGEN AND OXYGEN FROM A MIXTURE OF GASES CONTAINING AT LEAST ONE OF THE RECITED GASES, WHEREIN THE MIXTURE OF GASES IS BROUGHT INTO CONTACT WITH ONE SIDE OF A THIN, NON-POROUS POLYMERIC MEMBRANE, WHILE A REDUCED PARTIAL PRESSURE IN THE GAS TO BE SEPARATED IS MAINTAINED ON THE OPPOSITE SIDE OF SAID MEMBRANE AS COMPARED TO THE PARTIAL PRESSURE THEREOF ON SAID ONE SIDE, THE IMPROVEMENT COMPRISING THE USE OF A SOLID POLYARYLENE OXIDE FILM AS THE MEMBRANE, THE SOLID POLYARYLENE OXIDE FILM BEING COMPOSED OF RECURRING STRUCTURAL UNITS OF THE FORMULA
References Cited (Backward Citations)
FR1234336A
Cited
US3219626A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-06 | 1971-05-08 | 1971-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-06 | 1975-05-08 | 1975-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-06 | 1979-05-08 | 1979-11-07 | $7700.00 | Window Closed / Lapsed |