US3592761A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Asphaltene hydroconversion process
Assignee: Texaco Inc
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Filing: 1969-04-14
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Granted: 1971-07-13
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Expires: 1989-04-14
Abstract
Abstract AN ASPHALTENE HYDROCONVERSION PROCESS FOR THE CONVERSION OF ASPHALTENES TO LOWER BOILING HYDROCARBONS BY CONTACTING SAID ASPHALTENES WITH HYDROGEN IN THE PRESENCE OF A SOLID POLYMER PREPARED BY INTERACTING AN AROMATIC POLYCARBOXYLIC ACID ANHYDRIDE OR HALIDE PRODUCING COMPOUND WITH A POLYNUCLEAR AROMATIC COMPOUND.
Inventors
- 👤 Edward L Cole
- 👤 Edwin C Knowles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:18
CPC Classifications
C; C10; C10G; C10G47/00; C10G47/02; B; B01; B01J; B01J31/00; B01J31/02; B01J31/06; C10G47/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |