US2909498A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for treating asphalts in presence of quinone dioxime
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1957-03-29
•
Granted: 1959-10-20
•
Expires: 1977-03-29
Abstract
No abstract record available.
Inventors
- 👤 Andrew F Sayko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:43
CPC Classifications
C; C10; C10C; C10C3/00; C10C3/02; C10C3/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
A PROCESS FOR TREATING STRAIGHT RUN PETROLEUM ASPHALT STOCKS TO PROPDUCE ASPHALTS OF SUPERIOR PROPERTIES WHICH COMPRISEES BLOWING SAID STOCKS WITH AIR AT A TEMPERATURE OF FROM ABOUT 375* TO ABOUT 520*F. IN THE PRESENCE OF FSROM ABOUT 0.1 STO ABOUT 2.0% BY WEIGHT OF A QUINONE DIOXIME.
Claim 2
Dependent Claim
48 words
A PROCESS FOR TREATING STRAIGHT RUN PETROLEUM ASPHALT STOCKS TO PROPDUCE ASPHALTS OF SUPERIOR PROPERTIES WHICH COMPRISEES BLOWING SAID STOCKS WITH AIR AT A TEMPERATURE OF FROM ABOUT 375* TO ABOUT 520*F. IN THE PRESENCE OF FSROM ABOUT 0.1 STO ABOUT 2.0% BY WEIGHT OF A QUINONE DIOXIME.
References Cited (Backward Citations)
US1762688A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-19 | 1963-04-20 | 1963-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-19 | 1967-04-20 | 1967-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-19 | 1971-04-20 | 1971-10-20 | $7700.00 | Window Closed / Lapsed |