US3437587A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molecular sieve catalyst
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1961-11-29
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Granted: 1969-04-08
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Expires: 1981-11-29
Abstract
No abstract record available.
Inventors
- 👤 Henry George Ellert
- 👤 William Judson Mattox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:16
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/02; B01J20/10; B01J20/16; B01J20/18; B01J20/186; C; C10; C10G; C10G11/00; C10G11/02; C10G11/04; C10G11/05; C10G47/00; C10G47/02; C10G47/10; C10G47/12; C10G47/16
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
59 words
A METHOD FOR CRACKING A HYDROCARBON CHARGE WHICH COMPRISES CONTACTING THE SAME UNDER CATALYTIC CRACKING CONDITIONS WITH A CATALYST OF A CRYSTALLINE METAL ALUMINO-SILICATE WHICH HAS UNDERGONE COTACT PRIOR TO COMPLETION OF SAID CRACKING WITH HYDROGEN SULFIDE PRESENT IN AN AMOUNT SUFFICIENT TO EFFECTIVELY ENHANCE THE ACTIVITY OF SAID CATALYST, WHICH CATALYST IS CHARACTERIZED BY A UNIFORM PORE STRUCTURE.
Claim 2
Independent Claim
59 words
A METHOD FOR CRACKING A HYDROCARBON CHARGE WHICH COMPRISES CONTACTING THE SAME UNDER CATALYTIC CRACKING CONDITIONS WITH A CATALYST OF A CRYSTALLINE METAL ALUMINO-SILICATE WHICH HAS UNDERGONE COTACT PRIOR TO COMPLETION OF SAID CRACKING WITH HYDROGEN SULFIDE PRESENT IN AN AMOUNT SUFFICIENT TO EFFECTIVELY ENHANCE THE ACTIVITY OF SAID CATALYST, WHICH CATALYST IS CHARACTERIZED BY A UNIFORM PORE STRUCTURE.
Claim 3
Dependent Claim
34 words
A PROCESS FOR ENHANCING THE SELECTIVITY OF A CRYSTALLINE MOLECULAR SIEVE CATALYST HAVING UNIFORM PORE OPENINGS WHICH COMPRISES SELECTIVELY DEACTIVATING THE EXTERNAL SURFACE ACTIVITY OF SAID CATALYST BY TREATMENT WITH A BASIC NITROGEN COMPOUND.
Claim 4
Dependent Claim
34 words
A PROCESS FOR ENHANCING THE SELECTIVITY OF A CRYSTALLINE MOLECULAR SIEVE CATALYST HAVING UNIFORM PORE OPENINGS WHICH COMPRISES SELECTIVELY DEACTIVATING THE EXTERNAL SURFACE ACTIVITY OF SAID CATALYST BY TREATMENT WITH A BASIC NITROGEN COMPOUND.
References Cited (Backward Citations)
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US2916437A
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-07 | 1972-10-07 | 1973-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-07 | 1976-10-07 | 1977-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-07 | 1980-10-07 | 1981-04-08 | $7700.00 | Window Closed / Lapsed |