Patent US2934487A successfully refreshed from Google Patents.
US2934487A
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Table iii
Assignee: —
•
Filing: —
•
Granted: 1960-04-26
•
Expires: 1977-04-26
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:58
CPC Classifications
C; C10; C10G; C10G71/00; C10G2400/00; C10G2400/10; C10M; C10M2203/00; C10M2209/00; C10M2209/02; C10M2209/10; C10N; C10N2060/00; C10N2060/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
148 words
A PROCESS FOR PRODUCING AND RECOVERING A MATERIAL HAVING DETERGENT AND DISPERSANT PROPERTIES WHICH COMPROSES SUBJECTING A PROPANE-FRACTIONATED, SOLVENT-EXTRACTED HYDROCARBON FRACTION CONTAINING AT LEAST 40 CARBON ATOMS PER MOLECULE AND HAVING A VISCOSITY OF AT LEAST 58 SUS AT 210*F. TO OXIDATION IN THE PRESENCE OF NITRIC ACID CONTAINING FROM 10 TO 50 WEIGHT PERCENT HNO3 AT A PRESSURE OF 10 TO 50 P.S.I.A. AND A TEMPERATURE OF FROM ROOM TEMPERATURE TO 200*F. FOR A PERIOD OF TIME IN THE RANGE OF 1 MINUTE TO 30 HOURS, SUBJECTING THE REACTION PRODUCT TO A TEMPERATURE IN THE RANGE OF 400 TO 600*F. FOR A PERIOD OF TIME IN THE RANGE OF 1 TO 30 MINUTES, REMOVING REMAINING NITRIC ACID FROM THE REACTION PRODUCT, TREATING THE REACTION PRODUCT WITH WITH SUFFICIENT LIQUID PROPANE TO DISSOLVE UNREACTED OIL, AND RECOVERING THE PROPANE INSOLUBLE DETERGENT MATERIAL AS THE PRODUCT OF THE PROCESS.
References Cited (Backward Citations)
US2508016A
Cited
GB461972A
Cited
US2128574A
Cited
US2158650A
Cited
US2190453A
Cited
US2753307A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-26 | 1963-10-26 | 1964-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-26 | 1967-10-26 | 1968-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-26 | 1971-10-26 | 1972-04-26 | $7700.00 | Window Closed / Lapsed |