US4675180A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing quaternary ammonium salts
Assignee: BASF SE
•
Filing: 1986-02-18
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Granted: 1987-06-23
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Expires: 2006-02-18
Abstract
Abstract Compounds of the formula ##STR1## in which R 1 is long-chain alkyl, R 2 and R 3 are each lower alkyl and X⊖ is an anion, are prepared by quaternizing amines of the formula R 1 R 2 R 3 N with ethylene oxide in the presence of acid. This gives the quaternary compounds in virtually quantitative yield. The compounds are particularly suitable for use in hair cosmetics.
Inventors
- 👤 Franz Gunter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:11
CPC Classifications
A; A61; A61Q; A61Q5/00; A61Q5/12; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/40; A61K8/41; A61K8/416
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
5 words
A compound of the formula
Claim 2
Dependent Claim
5 words
A compound of the formula
Claim 3
Dependent Claim
12 words
An aqueous or aqueous-alcoholic solution of the compound of the formula ##STR10##
Claim 4
Dependent Claim
12 words
An aqueous or aqueous-alcoholic solution of the compound of the formula ##STR10##
Claim 5
Dependent Claim
20 words
A method of conditioning hair which comprises applying to the hair the aqueous or aqueous-alcoholic solution according to claim 2.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-06-22 | 1990-12-22 | 1991-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-22 | 1994-12-22 | 1995-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-22 | 1998-12-22 | 1999-06-23 | $7700.00 | Window Closed / Lapsed |