Patent US5738996A successfully refreshed from Google Patents.
US3085379A
Expired / Lapsed
US
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Purification of light gases with molecular sieves
Assignee: Union Carbide Corp
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Filing: 1960-03-09
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Granted: 1963-04-16
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Expires: 1980-03-09
Abstract
No abstract record available.
Inventors
- 👤 Kiyonaga Kazuo
- 👤 Marvin L Suval
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:39
CPC Classifications
C; C01; C01B; C01B23/00; B; B01; B01D; B01D53/00; B01D53/02; B01D53/04; C01B3/00; C01B3/50; C01B3/56; B01D2253/00; B01D2253/10; B01D2253/106; B01D2253/108; B01D2253/30; B01D2253/302; B01D2253/308; B01D2256/00; B01D2256/16; B01D2256/18; B01D2257/00; B01D2257/70; B01D2257/702; B01D2257/7022; B01D2259/00; B01D2259/40; B01D2259/40001; B01D2259/402; B01D53/047; C01B2203/00; C01B2203/04; C01B2203/042; C01B2203/043; C01B2203/0465; C01B2203/047; C01B2203/0475; C01B2203/048; C01B2203/0485; C01B2203/0495; Y; Y02; Y02C; Y02C20/00; Y02C20/20; Y02P; Y02P30/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A PROCESS FOR REMOVING LOW CONCENTRATIONS OF IMPURITIES FROM A GAS STREAM COMLPRISING THE STEPS OF PROVIDING AT LEAST TWO SEPARATE ZONES, EACH CONTAINING A ZEOLITIC MOLECULAR SIEVE ADSORBENT BED WHICH HAS A SELECTIVITY FOR THE IMPURITIES OVER THE PRODUCT COMOPONENT OF SAID GAS STREAM; PROVIDING AN IMPURITIES-CONTAINING FEED GAS STREAM; PASSING SAID FEED GAS STREAM THROUGH A FIRST SELECTIVE ADSORBENT BED AS AN ADSORPTION STROKE THEREBY REMOVING AT LEAST MOST OF THE IMPURITIES FROM SAID FEED
Claim 2
Dependent Claim
77 words
A PROCESS FOR REMOVING LOW CONCENTRATIONS OF IMPURITIES FROM A GAS STREAM COMLPRISING THE STEPS OF PROVIDING AT LEAST TWO SEPARATE ZONES, EACH CONTAINING A ZEOLITIC MOLECULAR SIEVE ADSORBENT BED WHICH HAS A SELECTIVITY FOR THE IMPURITIES OVER THE PRODUCT COMOPONENT OF SAID GAS STREAM; PROVIDING AN IMPURITIES-CONTAINING FEED GAS STREAM; PASSING SAID FEED GAS STREAM THROUGH A FIRST SELECTIVE ADSORBENT BED AS AN ADSORPTION STROKE THEREBY REMOVING AT LEAST MOST OF THE IMPURITIES FROM SAID FEED
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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) | 1966-04-15 | 1966-10-15 | 1967-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-15 | 1970-10-15 | 1971-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-15 | 1974-10-15 | 1975-04-16 | $7700.00 | Window Closed / Lapsed |