US2525145A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Supported phosphoric acid-boric acid catalyst and its manufacture
Assignee: Universal Oil Products Co
•
Filing: 1948-10-29
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Granted: 1950-10-10
•
Expires: 1968-10-29
Abstract
No abstract record available.
Inventors
- 👤 Julian M Mavity
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:13
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/14; B01J27/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
A PROCESS FOR MANUFACTURING A SOLID CATALYST WHICH COMPRISES MIXING FROM ABOUT 60 TO ABOUT 80% BY WEIGHT OF A PHOSPHORIC ACID AND FROM ABOUT 20 TO ABOUT 40% BY WEIGHT OF A MIXTURE OF SOLIDS COMPRISING FROM ABOUT 80 TO ABOUT 20% BY WEIGHT OF A SILICEOUS ADSORBENT AND FROM ABOUT 20 TO ABOUT 80% BY WEIGHT OF A BORON COMPOUND CONSISTING OF BORIC ACID AND ITS ANHYDRIDE, DRYING THE RESULTANT COMPOSITE AT A TEMPERATURE OF FROM ABOUT 350* TO ABOUT 500*F., AND CALCINING THE DRIED COMPOSITE AT A TEMPERATURE OF FROM ABOUT 500* TO ABOUT 1000*F.
Claim 2
Dependent Claim
98 words
A PROCESS FOR MANUFACTURING A SOLID CATALYST WHICH COMPRISES MIXING FROM ABOUT 60 TO ABOUT 80% BY WEIGHT OF A PHOSPHORIC ACID AND FROM ABOUT 20 TO ABOUT 40% BY WEIGHT OF A MIXTURE OF SOLIDS COMPRISING FROM ABOUT 80 TO ABOUT 20% BY WEIGHT OF A SILICEOUS ADSORBENT AND FROM ABOUT 20 TO ABOUT 80% BY WEIGHT OF A BORON COMPOUND CONSISTING OF BORIC ACID AND ITS ANHYDRIDE, DRYING THE RESULTANT COMPOSITE AT A TEMPERATURE OF FROM ABOUT 350* TO ABOUT 500*F., AND CALCINING THE DRIED COMPOSITE AT A TEMPERATURE OF FROM ABOUT 500* TO ABOUT 1000*F.
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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) | 1953-10-09 | 1954-04-10 | 1954-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-09 | 1958-04-10 | 1958-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-09 | 1962-04-10 | 1962-10-10 | $7700.00 | Window Closed / Lapsed |