Patent US3245919A successfully refreshed from Google Patents.
US3245919A
Expired / Lapsed
US
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Boehmite base precursor
Assignee: Sinclair Refining Co
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Filing: 1961-05-22
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Granted: 1966-04-12
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Expires: 1981-05-22
Abstract
No abstract record available.
Inventors
- 👤 John L Gring
- 👤 Mooi John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:00
CPC Classifications
B; B01; B01J; B01J35/00; B01J35/60; B01J21/00; B01J21/16; B01J23/00; B01J23/16; B01J23/24; B01J23/26; B01J23/38; B01J23/40; B01J23/42; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/88; B01J23/882; C; C01; C01F; C01F7/00; C01F7/02; C01F7/34; B01J35/61; B01J35/615; B01J35/63; B01J35/635; B01J35/638; B01J35/64; B01J35/647; C01P; C01P2002/00; C01P2002/60; C01P2002/70; C01P2002/72; C01P2004/00; C01P2004/01; C01P2004/03; C01P2004/50; C01P2004/60; C01P2004/61; C01P2004/62; C01P2006/00; C01P2006/10; C01P2006/12; C01P2006/14; C01P2006/16; C01P2006/17
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
A CATALYST CONSISTING ESSENTIALLY OF A CATALYTIC AMOUNT OF A CATALYTICALLY-ACTIVE METAL COMPONENT SELECTED FROM THE GROUP CONSISTING OF GROUP VIB AND GROUP VIII OF THE PERIODIC TABLE SUPPORTED ON GAMMA ALUMINA OBTAINED BY DRYING AN CALCINING A BOEHMITE ALUMINA PRODUCT, GRANULAR IN APPEARANCE WITH ACICULAR PARTICLES OF IRREGULAR EDGES, A PORE STRUCTURE TOTALLING AT LEAST ABOUT 0.5 CC. PER GRAM IN PORES LARGER THAN 80 A. IN SIZE, IN AN AVERAGE CRYSTALLITE SIZE GREATER THAN ABOUT 40 A. UP TO ABOUT 200 A. BY X-RAY DIFFRACTION ANALYSIS, AND COMPOSED OF A NON-HOMOGENEROUS INTEGRAL AGGREGATION OF POLYCRYSTALLINE BOEHMITE SUB-UNITS, SAID PARTICLES HAVING A LARGEST DIMENSION OF AT LEAST ABOUT 500 A. BY ELECTRON MICROSCOPE ANALYSIS.
Claim 2
Dependent Claim
115 words
A CATALYST CONSISTING ESSENTIALLY OF A CATALYTIC AMOUNT OF A CATALYTICALLY-ACTIVE METAL COMPONENT SELECTED FROM THE GROUP CONSISTING OF GROUP VIB AND GROUP VIII OF THE PERIODIC TABLE SUPPORTED ON GAMMA ALUMINA OBTAINED BY DRYING AN CALCINING A BOEHMITE ALUMINA PRODUCT, GRANULAR IN APPEARANCE WITH ACICULAR PARTICLES OF IRREGULAR EDGES, A PORE STRUCTURE TOTALLING AT LEAST ABOUT 0.5 CC. PER GRAM IN PORES LARGER THAN 80 A. IN SIZE, IN AN AVERAGE CRYSTALLITE SIZE GREATER THAN ABOUT 40 A. UP TO ABOUT 200 A. BY X-RAY DIFFRACTION ANALYSIS, AND COMPOSED OF A NON-HOMOGENEROUS INTEGRAL AGGREGATION OF POLYCRYSTALLINE BOEHMITE SUB-UNITS, SAID PARTICLES HAVING A LARGEST DIMENSION OF AT LEAST ABOUT 500 A. BY ELECTRON MICROSCOPE ANALYSIS.
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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) | 1969-04-11 | 1969-10-11 | 1970-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-11 | 1973-10-11 | 1974-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-11 | 1977-10-11 | 1978-04-12 | $7700.00 | Window Closed / Lapsed |