Patent US3227660A successfully refreshed from Google Patents.
US3227660A
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High-silica molecular sieve zeolites
Assignee: Union Oil Company of California
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Filing: 1962-11-13
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Granted: 1966-01-04
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Expires: 1982-11-13
Abstract
No abstract record available.
Inventors
- 👤 Rowland C Hansford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:28
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/20; C01B33/26; C01B33/28; C01B33/2807; C01B33/2838; C01B33/2853
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
1 words
9$0.2NA2O:AL2O3:WSIO2:XH2O
Claim 2
Independent Claim
115 words
A METHOD FOR THE MANUFACTURE OF A MOLECULAR SIEVE ZEOLITE OF THE Y CRYSTAL TYPE HAVING A SIO2/AL2O3 MOLERATIO GREATER THAN ABOUT 3.9, WHICH COMPRISES: (A) SUBJECTING A PREFORMED, PRECIPITATED HYDROGEL WHICH IS PREDOMINANTLY SILICA TO PARTIAL PEPTIZATION BY MILD AGITATION FOR ABOUT 10 MINUTES TO 3 HOURS AT A TEMPERATURE BETWEEN ABOUT 10* AND 50*C. IN AN AQUEOUS SODIUM HYDROXIDE SOLUTION WHEREIN THE SIO2/NA2O MOLE-RATIO IS BETWEEN ABOUT 4 AND 20 AND THE H2O/ NA2O MOLE-RATIO IS BETWEEN ABOUT 30 AND 200; (B) ADDING ADDITIONAL WATER, SODIUM HYDROXIDE AND SODIUM ALUMINATE TO THE PEPTIZED SLURRY FROM STEP (A) TO PROVIDE A CRYSTALLIZATION MIXTURE WHEREIN THE MOLAR RATIOS OF COMPONENTS ARE WITHIN THE FOLLOWING RANGES:
References Cited (Backward Citations)
US2882244A
Cited
DE1098929B
Cited
US2983670A
Cited
US3130006A
Cited
US3130007A
Cited
US3140251A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-03 | 1969-07-05 | 1970-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-03 | 1973-07-05 | 1974-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-03 | 1977-07-05 | 1978-01-04 | $7700.00 | Window Closed / Lapsed |