US3126329A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blown bitumens and a process
Assignee: —
•
Filing: —
•
Granted: 1964-03-24
•
Expires: 1981-03-24
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:37
CPC Classifications
C; C10; C10C; C10C3/00; C10C3/02; C10C3/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A METHOD OF PREPARING A BLOWN BITUMEN, IN WHICH AN OXIDISING GAS SELECTED FROM THE GROUP CONSISTING OF OXYGEN AND A MIXTURE OF OXYGEN AND AN INERT GAS, IS BLOWN THROUGH A RESIDUAL PETROLEUM FRACTION WHICH IS MAINTAINED AT A TEMPERATURE WITHIN THE RANGE 150*C. TO 300*C. IN THE PRESENCE OF A FLUID CATALYS CONSISTING OF AN ANHYDROUS SOLUTION OF 50% TO 80% BY WEIGHT PHOSPHORUS PENTOXIDE IN 50% TO 20% BY WEIGHT OF PHOSPHORIC ACID HAVING THE GENERAL FORMULA:
Claim 2
Independent Claim
80 words
A METHOD OF PREPARING A BLOWN BITUMEN, IN WHICH AN OXIDISING GAS SELECTED FROM THE GROUP CONSISTING OF OXYGEN AND A MIXTURE OF OXYGEN AND AN INERT GAS, IS BLOWN THROUGH A RESIDUAL PETROLEUM FRACTION WHICH IS MAINTAINED AT A TEMPERATURE WITHIN THE RANGE 150*C. TO 300*C. IN THE PRESENCE OF A FLUID CATALYS CONSISTING OF AN ANHYDROUS SOLUTION OF 50% TO 80% BY WEIGHT PHOSPHORUS PENTOXIDE IN 50% TO 20% BY WEIGHT OF PHOSPHORIC ACID HAVING THE GENERAL FORMULA:
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-03-24 | 1967-09-23 | 1968-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-24 | 1971-09-23 | 1972-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-24 | 1975-09-23 | 1976-03-24 | $7700.00 | Window Closed / Lapsed |