US2593720A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Supported phosphoric acid catalyst containing a pitch resin binder and its preparation
Assignee: Universal Oil Products Co
•
Filing: 1948-11-18
•
Granted: 1952-04-22
•
Expires: 1968-11-18
Abstract
No abstract record available.
Inventors
- 👤 Mitchell S Bielawski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:46
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/14; B01J27/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
A SOLID CATALYST COMPRISING A CALCINED MIXTURE OF FROM ABOUT 50 TO ABOUT 75% BY WEIGHT OF A PHOSPHORIC ACID, FROM ABOUT 20 TO ABOUT 49.5% BY WEIGHT OF A SILICEOUS ADSORBENT, AND FROM ABOUT 0.5 TO ABOUT 5% BY WEIGHT OF A PINE WOOD PITCH RESIN SUBSTANTIALLY INSOLUBLE IN PARAFFLNIC HYDROCARBONS.
Claim 2
Dependent Claim
52 words
A SOLID CATALYST COMPRISING A CALCINED MIXTURE OF FROM ABOUT 50 TO ABOUT 75% BY WEIGHT OF A PHOSPHORIC ACID, FROM ABOUT 20 TO ABOUT 49.5% BY WEIGHT OF A SILICEOUS ADSORBENT, AND FROM ABOUT 0.5 TO ABOUT 5% BY WEIGHT OF A PINE WOOD PITCH RESIN SUBSTANTIALLY INSOLUBLE IN PARAFFLNIC HYDROCARBONS.
References Cited (Backward Citations)
US2120723A
Cited
US2120702A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-22 | 1955-10-22 | 1956-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-22 | 1959-10-22 | 1960-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-22 | 1963-10-22 | 1964-04-22 | $7700.00 | Window Closed / Lapsed |