US2926176A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Condensation of aromatic sulfonic acids with carbohydrates and related materials
Assignee: Universal Oil Products Co
•
Filing: 1957-06-18
•
Granted: 1960-02-23
•
Expires: 1977-06-18
Abstract
No abstract record available.
Inventors
- 👤 Carl B Linn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:45
CPC Classifications
C; C08; C08B; C08B15/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
A PROCESS WHICH COMPRISES REACTING AN AROMATIC SULFONIC ACID SELECTED FROM THE GROUP CONSISTING OF BENZENE, ALKYLBENZENE, CHLOROBENZENE, BROMOBENZENE, NITROBENZENE AND NAPHTHYLSULFONIC ACIDS WITH A CARBOHYDRATE SELECTED FROM THE GROUP CONSISTING OF MONOSACCHARIDES, OLIGOSACCHARIDES, AND POLYSACCHARIDES, IN THE PRESENCE OF HYDROGEN FLUORIDE CATALYST AT A TEMPERATURE OF FROM ABOUT -40*C. TO ABOUT 100*C.
Claim 2
Dependent Claim
53 words
A PROCESS WHICH COMPRISES REACTING AN AROMATIC SULFONIC ACID SELECTED FROM THE GROUP CONSISTING OF BENZENE, ALKYLBENZENE, CHLOROBENZENE, BROMOBENZENE, NITROBENZENE AND NAPHTHYLSULFONIC ACIDS WITH A CARBOHYDRATE SELECTED FROM THE GROUP CONSISTING OF MONOSACCHARIDES, OLIGOSACCHARIDES, AND POLYSACCHARIDES, IN THE PRESENCE OF HYDROGEN FLUORIDE CATALYST AT A TEMPERATURE OF FROM ABOUT -40*C. TO ABOUT 100*C.
References Cited (Backward Citations)
US2252725A
Cited
US2798079A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-22 | 1963-08-24 | 1964-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-22 | 1967-08-24 | 1968-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-22 | 1971-08-24 | 1972-02-23 | $7700.00 | Window Closed / Lapsed |