US2906687A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of oxidizing asphalts
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1957-10-24
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Granted: 1959-09-29
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Expires: 1977-10-24
Abstract
No abstract record available.
Inventors
- 👤 Joseph C Roediger
- 👤 Kenneth G Morris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:14
CPC Classifications
C; C10; C10C; C10C3/00; C10C3/02; C10C3/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
IN THE OXIDATION OF A PETROULEM ASPHALT BY AIR-BLOW ING THE ASPHALT IN THE PRESENCE OF A PHOSPHORUS-CONTAINING OXIDATION CATALYST, THE IMPROVEMENT WHICH COMPRISES AIR-BLOWING SAID ASPHALT IN THE PRESENCE OF A CATALYTIC AMOUNT OF THE REACTION PRODUCT OF A COMPOUND SELECTED FROM THE CLASS CONSISTING OF OXIDES AND SULFIDES OF PHOSPHORUS AND AN OXYGENATED HYDROCARBONACEOUS MATERIAL HAVING AT LEAST ONE SUBSTITUENT FROM THE CLASS CONSISTING OF CARBOXYL GROUPS, HYDROXYL GROUPS, CARBONYL GROUP AND OLEFINIC DOUBLE BONDS, BOILING ABOVE ABOUT 300*F.
Claim 2
Dependent Claim
81 words
IN THE OXIDATION OF A PETROULEM ASPHALT BY AIR-BLOW ING THE ASPHALT IN THE PRESENCE OF A PHOSPHORUS-CONTAINING OXIDATION CATALYST, THE IMPROVEMENT WHICH COMPRISES AIR-BLOWING SAID ASPHALT IN THE PRESENCE OF A CATALYTIC AMOUNT OF THE REACTION PRODUCT OF A COMPOUND SELECTED FROM THE CLASS CONSISTING OF OXIDES AND SULFIDES OF PHOSPHORUS AND AN OXYGENATED HYDROCARBONACEOUS MATERIAL HAVING AT LEAST ONE SUBSTITUENT FROM THE CLASS CONSISTING OF CARBOXYL GROUPS, HYDROXYL GROUPS, CARBONYL GROUP AND OLEFINIC DOUBLE BONDS, BOILING ABOVE ABOUT 300*F.
References Cited (Backward Citations)
US2450756A
Cited
US2758069A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-28 | 1963-03-30 | 1963-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-28 | 1967-03-30 | 1967-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-28 | 1971-03-30 | 1971-09-29 | $7700.00 | Window Closed / Lapsed |