US2833727A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of solid phosphoric acid catalysts
Assignee: Universal Oil Products Co
•
Filing: 1954-07-28
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Granted: 1958-05-06
•
Expires: 1974-07-28
Abstract
No abstract record available.
Inventors
- 👤 Julian M Mavity
- 👤 Mitchell S Bielawski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:55
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/14; B01J27/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
A PROCESS FOR THE MANUFACTURE OF A SOLID PHOSPHORIC ACID CATALYST WHICH COMPRISES MIXING A PHOSPHORIC ACID AND A SILICEOUS ADSORBENT, SUBJECTING THE RESULTING MIXTURE TO COMPRESSION AT A PRESSURE OF FROM ABOUT 5000 TO ABOUT 50,000 POUNDS PER SQUARE INCH, AND THEREAFTER EXTRUDING, DRYING AND CALCINING SAID MIXTURE.
Claim 2
Dependent Claim
49 words
A PROCESS FOR THE MANUFACTURE OF A SOLID PHOSPHORIC ACID CATALYST WHICH COMPRISES MIXING A PHOSPHORIC ACID AND A SILICEOUS ADSORBENT, SUBJECTING THE RESULTING MIXTURE TO COMPRESSION AT A PRESSURE OF FROM ABOUT 5000 TO ABOUT 50,000 POUNDS PER SQUARE INCH, AND THEREAFTER EXTRUDING, DRYING AND CALCINING SAID MIXTURE.
References Cited (Backward Citations)
US2120723A
Cited
US2694048A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-05 | 1961-11-04 | 1962-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-05 | 1965-11-04 | 1966-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-05 | 1969-11-04 | 1970-05-06 | $7700.00 | Window Closed / Lapsed |