Patent JPS474600Y1 successfully refreshed from Google Patents.
US3274750A
Expired / Lapsed
US
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Permeable polymeric membrane gas separation
Assignee: General Electric Co
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Filing: 1962-12-28
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Granted: 1966-09-27
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Expires: 1982-12-28
Abstract
No abstract record available.
Inventors
- 👤 Walter L Robb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:12
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/22; B01D53/225; B01D53/226; B01D71/00; B01D71/06; B01D71/70; B01D71/701
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
69 words
A METHOD FOR SEPARATING XENON AND KRYPTON FROM A. GAS MIXTURE CONSISTING ESSENTIALLY OF NITROGEN, XENON AND KRYPTON COMPRISING THE STEPS OF: BRINGING THE MIXTURE INTO CONTACT WITH ONE SIDE OF A THIN, NON-POROUS SILICONE RUBBER MEMBRANE, CAUSING A PORTION OF THE MMIXTURE TO PERMEATE THROUGH SAID MEMBRANE AND REMOVING THE GAS MIXTURE ENRICHED TO A SUBSTANTIAL DEGREE IN XENON AND KRYPTON FROM THE OPPOSITE SIDE OF SAID MEMBRANE.
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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) | 1969-09-26 | 1970-03-28 | 1970-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-26 | 1974-03-28 | 1974-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-26 | 1978-03-28 | 1978-09-27 | $7700.00 | Window Closed / Lapsed |