US4411891A
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Cationized dextran and salts thereof and manufacturing process and utilization thereof
Assignee: Meito Sangyo KK
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Filing: 1981-06-16
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Granted: 1983-10-25
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Expires: 2001-06-16
Abstract
Abstract A cationized dextran of the following formula ##STR1## wherein R represents a group selected from the class consisting of a hydrogen atom, hydroxy lower alkyl groups, and quaternary nitrogen-containing groups of the formula ##STR2## in which R 1 , R 2 and R 3 each represent a lower alkyl group, and R' represents a hydrogen atom or a hydroxy lower alkyl group, and n is a positive number of from 1 to 8,000; two or more R groups may be identical or different provided that at least one of R groups is the quaternary nitrogen-containing group of the above formula; and a salt thereof; a process for its production; and a hair or skin cosmetic composition containing aforesaid cationized dextran or its salt.
Inventors
- 👤 Akihiro Mizutani
- 👤 Kimio Hirose
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:51
CPC Classifications
C; C08; C08B; C08B37/00; C08B37/0006; C08B37/0009; C08B37/0021; A; A61; A61K; A61K8/00; A61K8/18; A61K8/72; A61K8/73; A61Q; A61Q19/00; A61Q5/00; A61Q5/12; A61K2800/00; A61K2800/40; A61K2800/54; A61K2800/542; A61K2800/5426; A61Q1/00; A61Q1/14; A61Q19/10; A61Q5/02; A61Q5/06
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
104 words
A cationized dextran of the following formula ##STR11## wherein R represents a group selected from the class consisting of a hydrogen atom, hydroxy lower alkyl groups, and quaternary nitrogen-containing groups of the formula ##STR12## in which R 1 , R 2 and R 3 each represent a lower alkyl group, and R' represents a hydrogen atom or a hydroxy lower alkyl group, and n is a positive number of from 1 to 8,000; two or more R groups may be identical or different provided that at least one of R groups is the quaternary nitrogen-containing group of the above formula; and a salt thereof.
Claim 2
Dependent Claim
104 words
A cationized dextran of the following formula ##STR11## wherein R represents a group selected from the class consisting of a hydrogen atom, hydroxy lower alkyl groups, and quaternary nitrogen-containing groups of the formula ##STR12## in which R 1 , R 2 and R 3 each represent a lower alkyl group, and R' represents a hydrogen atom or a hydroxy lower alkyl group, and n is a positive number of from 1 to 8,000; two or more R groups may be identical or different provided that at least one of R groups is the quaternary nitrogen-containing group of the above formula; and a salt thereof.
Claim 3
Dependent Claim
47 words
The compound of claim 1 wherein the hydroxy lower alkyl group represented by R and R' is a hydroxy(C 1 -C 4 alkyl) group, and the lower alkyl group represented by R 1 , R 2 and R 3 is a C 1 -C 4 alkyl group.
Claim 4
Dependent Claim
18 words
The cationized dextran of claim 1 or 2 having a substitution degree of about 3 to about 100%.
Claim 5
Dependent Claim
18 words
The cationized dextran of claim 1 or 2 having a substitution degree of about 5 to about 95%.
Claim 6
Dependent Claim
18 words
The cationized dextran of claim 1 or 2 wherein n is a positive number of 4 to 6,000.
Claim 7
Dependent Claim
125 words
A hair or skin cosmetic composition comprising (1) a hair or skin cosmetic base and (2) a cationized dextran of the formula ##STR13## wherein R represents a group selected from the class consisting of a hydrogen atom, hydroxy lower alkyl groups, and quaternary nitrogen-containing groups of the formula ##STR14## in which R 1 , R 2 and R 3 each represent a lower alkyl group, and R' represents a hydrogen atom or a hydroxy lower alkyl group, and n is a positive number of from 1 to 8,000; two or more R groups may be identical or different provided that at a least one of R groups is the quaternary nitrogen-containing group of the above formula; or its salt acceptable for hair or skin cosmetics.
Claim 8
Dependent Claim
125 words
A hair or skin cosmetic composition comprising (1) a hair or skin cosmetic base and (2) a cationized dextran of the formula ##STR13## wherein R represents a group selected from the class consisting of a hydrogen atom, hydroxy lower alkyl groups, and quaternary nitrogen-containing groups of the formula ##STR14## in which R 1 , R 2 and R 3 each represent a lower alkyl group, and R' represents a hydrogen atom or a hydroxy lower alkyl group, and n is a positive number of from 1 to 8,000; two or more R groups may be identical or different provided that at a least one of R groups is the quaternary nitrogen-containing group of the above formula; or its salt acceptable for hair or skin cosmetics.
Claim 9
Dependent Claim
20 words
The cosmetic composition of claim 6 which comprises from about 0.1 to about 5% by weight of the cationized dextran.
Claim 10
Dependent Claim
59 words
The cosmetic composition of claim 6 or 7 wherein the cationized dextran has a quaternary nitrogen substitution degree of about 3 to about 40%, a hydroxy lower alkyl group substitution degree of 0 to about 90%, with the total substitution degree being about 5 to about 95%, and n is a positive number of about 4 to about 6,000.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1986-10-24 | 1987-04-25 | 1987-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-24 | 1991-04-25 | 1991-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-24 | 1995-04-25 | 1995-10-25 | $7700.00 | Window Closed / Lapsed |