Patent JPS4422981B1 successfully refreshed from Google Patents.
US2996558A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molecular sieve separation process
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1957-04-17
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Granted: 1961-08-15
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Expires: 1977-04-17
Abstract
No abstract record available.
Inventors
- 👤 Jr George F Feldbauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:01
CPC Classifications
C; C10; C10G; C10G25/00; C10G25/02; C10G25/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
IN A STAGED MOLECULAR SIEVE ADSORPTION-DESORPTION PROCESS WHEREIN THE DESORPTION CYCLE IS CONDUCTED AT A HIGHER TEMPERATURE THAN THE ADSORPTION CYCLE, THE IMPROVEMENT WHICH COMPRISES UTILIZING THREE STAGES, MAINTAINING A FIRST STAGE ON DESORPTION, A SECOND STAGE ON COOLING AND A THIRD STAGE ON ADSORPTION, HEATING SAID FIRST STAGE TO BRING SAID SOLIDS TO A DESORPTION TEMPERATURE, COOLING SAID SECOND STAGE FROM A DESORPTION TEMPERATURE TO AN ADSORPTION TEMPERATURE BY PASSING THROUGH SAID SECOND STAGE A RAFFINATE STREAM FROM SAID THIRD STAGE, AND HEATING THE FEED TO SAID THIRD STAGE BY CONTACTING SAID
Claim 2
Dependent Claim
93 words
IN A STAGED MOLECULAR SIEVE ADSORPTION-DESORPTION PROCESS WHEREIN THE DESORPTION CYCLE IS CONDUCTED AT A HIGHER TEMPERATURE THAN THE ADSORPTION CYCLE, THE IMPROVEMENT WHICH COMPRISES UTILIZING THREE STAGES, MAINTAINING A FIRST STAGE ON DESORPTION, A SECOND STAGE ON COOLING AND A THIRD STAGE ON ADSORPTION, HEATING SAID FIRST STAGE TO BRING SAID SOLIDS TO A DESORPTION TEMPERATURE, COOLING SAID SECOND STAGE FROM A DESORPTION TEMPERATURE TO AN ADSORPTION TEMPERATURE BY PASSING THROUGH SAID SECOND STAGE A RAFFINATE STREAM FROM SAID THIRD STAGE, AND HEATING THE FEED TO SAID THIRD STAGE BY CONTACTING SAID
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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) | 1964-08-14 | 1965-02-13 | 1965-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-14 | 1969-02-13 | 1969-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-14 | 1973-02-13 | 1973-08-15 | $7700.00 | Window Closed / Lapsed |