US3133950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing amino alkyl sulfates
Assignee: Interchemical Corp
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Filing: 1959-09-18
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Granted: 1964-05-19
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Expires: 1979-09-18
Abstract
No abstract record available.
Inventors
- 👤 Roy A Pizzarello
- 👤 Alfred F Schneid
- 👤 Resnick Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:31
CPC Classifications
C; C07; C07C; C07C305/00; C07C305/02; C07C305/04; C07C305/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
THE METHOD OF PREPARING B-AMINO ALKYL SULFATES WHICH COMPRISES REACTING A B-AMINO ALKANOL AT REFLUX TEMPERATURE IN THE PRESENCE OF A MINOR AMOUNT OF A CATIONIC SURFACE-ACTIVE AGENT WITH AN EQUINOLAR AMOUNT OF SULFURIC ACID IN AN INERT SOLVENT THAT FORMS AN AZEOTROPIC MIXTURE WITH WATER SELECTED FROM THE GROUP CONSISTING OF BENZENE, TOLUENE, AND XYLENE AND REMOVING THE WATER OF REACTION BY AZETROPIC DISTILLATION.
Claim 2
Independent Claim
65 words
THE METHOD OF PREPARING B-AMINO ALKYL SULFATES WHICH COMPRISES REACTING A B-AMINO ALKANOL AT REFLUX TEMPERATURE IN THE PRESENCE OF A MINOR AMOUNT OF A CATIONIC SURFACE-ACTIVE AGENT WITH AN EQUINOLAR AMOUNT OF SULFURIC ACID IN AN INERT SOLVENT THAT FORMS AN AZEOTROPIC MIXTURE WITH WATER SELECTED FROM THE GROUP CONSISTING OF BENZENE, TOLUENE, AND XYLENE AND REMOVING THE WATER OF REACTION BY AZETROPIC DISTILLATION.
References Cited (Backward Citations)
GB581539A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-05-19 | 1967-11-18 | 1968-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-19 | 1971-11-18 | 1972-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-19 | 1975-11-18 | 1976-05-19 | $7700.00 | Window Closed / Lapsed |