US3224167A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modified zeolitic molecular sieves and process for producing same
Assignee: Union Carbide Corp
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Filing: 1963-01-21
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Granted: 1965-12-21
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Expires: 1983-01-21
Abstract
No abstract record available.
Inventors
- 👤 Robert A Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:00
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/02; B01J20/10; B01J20/16; B01J20/18; Y; Y10; Y10S; Y10S423/00; Y10S423/24; Y10S95/00; Y10S95/90; Y10S95/902
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
PROCESS FOR REDUCING THE APPARENT PORE SIZE OF SODIUM A ZEOLITIC MOLECULAR SIEVE WHICH COMPRISES CONTACTING SAID MOLECULAR SIEVE WITH STEAM AT A WATER VAPOR PRESSURE OF GREATER THAN 25 MM. HG AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 250*D. TO ABOUT 650*C. AND FOR A TIME PERIOD OF FROM ABOUT 0.5 TO ABOUT 200 HOURS, SAID PERIOD OF TIME, WATER VAPOR PRESSURE AND TEMPERATURE BEING COMMENSURATE SUCH THAT THE OXYGEN ADSORPTION CAPACITY OF THE STEAM TREATED MOLECULAR SIEVE AFTER REACTIVATION IS LESS THAN ABOUT 10.6 WEIGHT PERCENT MEASURED AT -183*C. AND 700 MM. HG PRESSURE.
Claim 2
Dependent Claim
97 words
PROCESS FOR REDUCING THE APPARENT PORE SIZE OF SODIUM A ZEOLITIC MOLECULAR SIEVE WHICH COMPRISES CONTACTING SAID MOLECULAR SIEVE WITH STEAM AT A WATER VAPOR PRESSURE OF GREATER THAN 25 MM. HG AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 250*D. TO ABOUT 650*C. AND FOR A TIME PERIOD OF FROM ABOUT 0.5 TO ABOUT 200 HOURS, SAID PERIOD OF TIME, WATER VAPOR PRESSURE AND TEMPERATURE BEING COMMENSURATE SUCH THAT THE OXYGEN ADSORPTION CAPACITY OF THE STEAM TREATED MOLECULAR SIEVE AFTER REACTIVATION IS LESS THAN ABOUT 10.6 WEIGHT PERCENT MEASURED AT -183*C. AND 700 MM. HG PRESSURE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-20 | 1969-06-21 | 1969-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-20 | 1973-06-21 | 1973-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-20 | 1977-06-21 | 1977-12-21 | $7700.00 | Window Closed / Lapsed |