Patent US4196565A successfully refreshed from Google Patents.
US3373101A
Expired / Lapsed
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Friedel-crafts catalyst plus bitumen to produce pitch of increased beta resin content
Assignee: Union Oil Company of California
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Filing: 1964-01-24
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Granted: 1968-03-12
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Expires: 1984-01-24
Abstract
No abstract record available.
Inventors
- 👤 Hillis O Folkins
- 👤 John W Walsh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:17
CPC Classifications
C; C10; C10C; C10C3/00; C10C3/02; C10C3/023
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
A PROCESS FOR THE PREPARATION OF A PETROLEUM PITCH WHICH COMPRISES HEATING A CRACKED PETROLEUM BITUMINOUS MATERIAL AT A TEMPERATURE OF ABOUT 650* TO 850*F. IN THE PRESENCE OF A FRIEDEL CRAFTS CATALYST, THE CONCENTRATION OF SAID CATALYST BEING ABOUT 0.1 TO 5.0 WT. PERCENT OF THE PETROLEUM BITUMINOUS MATERIAL UNTIL A PITCH HAVING A SOFTENING POINT OF 180* TO 250*F. AND BETA-RESIN CONTENT FROM 17 TO 24 PERCENT IS PRODUCED AND RECOVERING SAID PITCH FROM SAID PROCESS.
Claim 2
Dependent Claim
78 words
A PROCESS FOR THE PREPARATION OF A PETROLEUM PITCH WHICH COMPRISES HEATING A CRACKED PETROLEUM BITUMINOUS MATERIAL AT A TEMPERATURE OF ABOUT 650* TO 850*F. IN THE PRESENCE OF A FRIEDEL CRAFTS CATALYST, THE CONCENTRATION OF SAID CATALYST BEING ABOUT 0.1 TO 5.0 WT. PERCENT OF THE PETROLEUM BITUMINOUS MATERIAL UNTIL A PITCH HAVING A SOFTENING POINT OF 180* TO 250*F. AND BETA-RESIN CONTENT FROM 17 TO 24 PERCENT IS PRODUCED AND RECOVERING SAID PITCH FROM SAID PROCESS.
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) | 1971-03-12 | 1971-09-11 | 1972-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-12 | 1975-09-11 | 1976-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-12 | 1979-09-11 | 1980-03-12 | $7700.00 | Window Closed / Lapsed |