US3280130A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of sulfobetaines of heterocyclic bases of the aromatic type
Assignee: Dehydag Deutsche Hydrierwerke GmbH
•
Filing: 1963-07-18
•
Granted: 1966-10-18
•
Expires: 1983-07-18
Abstract
No abstract record available.
Inventors
- 👤 Gundel Wolfgang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:25
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C07; C07D; C07D217/00; C07D217/02; C07D217/10; C25D3/12; C25D3/14; C25D3/18
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
125 words
PROCESS FOR THE PREPARATION OF SULFOBETAINES CONTAINING HYDROXY GROUPS WHICH COMPRISES (1) REACTING AN AROMATIC HETEROCYCLIC BASE SELECTED FROM THE GROUP CONSISTING OF PYRIDINE, HALOGENATED PYRIDINE, LOWER ALKYLATED PYRIDINE, QUINOLINE, HALOGENATED QUINOLINE AND LOWER ALKYLATED QUINOLINE, WITH EPICHLOROHYDRIN, IN THE PRESENCE OF WATER, AND UNDER THE ADDITION OF AN AGENT CAPABLE OF TYING UP BASES SELECTED FROM THE GROUP CONSISTING OF MINERAL ACIDS SALTS OF MINERALS ACIDS, ORGANIC CARBOXYLIC ACIDS AND ORGANIC SOULFONIC ACIDS TO FORM A QUATERNARY SALT CONTAINING CHLORINE IN ORGANIC LINKAGE, SAID AGENT CAPABLE OF TYING UP BASES BEING ADDED AT SUCH A RATE THAT THE REACTION MIXTURE IS MAINTAINED AT A PH BETWEEN 7 AND 8 AND (2) SUBSEQUENTLY REACTING SAID QUATERNARY SALT WITH AN ALKALI METAL SALT OF SULFUROUS ACID.
Claim 2
Dependent Claim
125 words
PROCESS FOR THE PREPARATION OF SULFOBETAINES CONTAINING HYDROXY GROUPS WHICH COMPRISES (1) REACTING AN AROMATIC HETEROCYCLIC BASE SELECTED FROM THE GROUP CONSISTING OF PYRIDINE, HALOGENATED PYRIDINE, LOWER ALKYLATED PYRIDINE, QUINOLINE, HALOGENATED QUINOLINE AND LOWER ALKYLATED QUINOLINE, WITH EPICHLOROHYDRIN, IN THE PRESENCE OF WATER, AND UNDER THE ADDITION OF AN AGENT CAPABLE OF TYING UP BASES SELECTED FROM THE GROUP CONSISTING OF MINERAL ACIDS SALTS OF MINERALS ACIDS, ORGANIC CARBOXYLIC ACIDS AND ORGANIC SOULFONIC ACIDS TO FORM A QUATERNARY SALT CONTAINING CHLORINE IN ORGANIC LINKAGE, SAID AGENT CAPABLE OF TYING UP BASES BEING ADDED AT SUCH A RATE THAT THE REACTION MIXTURE IS MAINTAINED AT A PH BETWEEN 7 AND 8 AND (2) SUBSEQUENTLY REACTING SAID QUATERNARY SALT WITH AN ALKALI METAL SALT OF SULFUROUS ACID.
Claim 3
Dependent Claim
12 words
THE PROCESS OF CLAIM 1, WHEREIN THE AROMATIC HETEROCYCLIC BASE IS ISOQUINOLINE.
References Cited (Backward Citations)
US2146646A
Cited
FR795417A
Cited
GB482515A
Cited
US2761866A
Cited
US3054733A
Cited
US3023151A
Cited
US3109846A
Cited
US3131189A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-17 | 1970-04-18 | 1970-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-17 | 1974-04-18 | 1974-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-17 | 1978-04-18 | 1978-10-18 | $7700.00 | Window Closed / Lapsed |