US2738336A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of solid phosphoric acid catalysts
Assignee: Universal Oil Products Co
•
Filing: 1952-09-24
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Granted: 1956-03-13
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Expires: 1972-09-24
Abstract
No abstract record available.
Inventors
- 👤 Julian M Mavity
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:24
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/02; C07C2/04; C07C2/06; C07C2/08; C07C2/14; C07C2/18; B; B01; B01J; B01J27/00; B01J27/14; B01J27/16; C07C2527/00; C07C2527/14; C07C2527/16; C07C2527/167; C07C2527/173
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
A PROCESS FOR MANUFACTURING A HIGHLY ACTIVE SOLID PHOSPHORIC ACID CATALYST WHICH COMPRISES REACTING A PHOSPHORIC ACID AND AN ALKYL ORTHOSILICATE HAVING FROM 1 TO ABOUT 5 CARBON ATOMS IN EACH ALKYL GROUP, DRYING AND CALCINING THE RESULTANT REACTION PRODUCT.
Claim 2
Dependent Claim
40 words
A PROCESS FOR MANUFACTURING A HIGHLY ACTIVE SOLID PHOSPHORIC ACID CATALYST WHICH COMPRISES REACTING A PHOSPHORIC ACID AND AN ALKYL ORTHOSILICATE HAVING FROM 1 TO ABOUT 5 CARBON ATOMS IN EACH ALKYL GROUP, DRYING AND CALCINING THE RESULTANT REACTION PRODUCT.
References Cited (Backward Citations)
US2030048A
Cited
US2317803A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-13 | 1959-09-12 | 1960-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-13 | 1963-09-12 | 1964-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-13 | 1967-09-12 | 1968-03-13 | $7700.00 | Window Closed / Lapsed |