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US4845207A
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US
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3-alkoxy-2-hydroxypropylhydroxyethylcellulose and building composition containing the same
Assignee: AQUALON BV A CORP OF NETHERLANDS
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Filing: 1987-06-17
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Granted: 1989-07-04
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Expires: 2007-06-17
Abstract
Abstract A new nonionic, water-soluble cellulose ether, i.e., 3-alkoxy-2-hydroxypropylhydroxyethyl cellulose radical wherein alkyl moiety is a straight or branched chain alkyl group containing 1 to 10 carbon atoms, and a building composition based on hydraulic or synthetic binder containing the new nonionic, cellulose ether are disclosed. The building composition has superior physical properties as compared to prior compositions containing other cellulose derivatives.
Inventors
- 👤 Harald E. t'Sas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:09
CPC Classifications
C; C08; C08B; C08B11/00; C08B11/193; C04; C04B; C04B24/00; C04B24/24; C04B24/38; C04B24/383; C08B11/02; C08B11/04; C08B11/08
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
41 words
Nonionic, water-soluble 3-alkoxy-2-hydroxypropyl hydroxyethylcellulose comprising 0.05 to about 50%, based on the weight of the substituted hydroxyethylcellulose, of at least one 3-alkoxy-2-hydroxypropyl group wherein the alkyl moiety is a straight or branched chain alkyl group having 2 to 6 carbon atoms.
Claim 2
Dependent Claim
41 words
Nonionic, water-soluble 3-alkoxy-2-hydroxypropyl hydroxyethylcellulose comprising 0.05 to about 50%, based on the weight of the substituted hydroxyethylcellulose, of at least one 3-alkoxy-2-hydroxypropyl group wherein the alkyl moiety is a straight or branched chain alkyl group having 2 to 6 carbon atoms.
Claim 3
Dependent Claim
18 words
The nonionic, water-soluble 3-alkoxy-2-hydroxypropylhydroxyethylcellulose of claim 1 having a hydroxyethyl M.S. of from about 1.5 to about 3.5.
Claim 4
Dependent Claim
17 words
The nonionic, water-soluble 3-alkoxy-2-hydroxypropylhydroxyethylcellulose of claim 1 wherein the alkyl moiety is a straight chain alkyl group.
Claim 5
Dependent Claim
17 words
The nonionic, water-soluble 3-alkoxy-2-hydroxypropylhydroxyethylcellulose of claim 2 wherein the alkyl moiety is a straight chain alkyl group.
Claim 6
Dependent Claim
16 words
The nonionic, water-soluble 3-alkoxy-2-hydroxypropylhydroxyethylcellulose of claim 1 substituted with 0.1 to 25% of one 3-alkoxy-2-hydroxypropyl group.
Claim 7
Dependent Claim
16 words
The nonionic, water-soluble 3-alkoxy-2-hydroxypropylhydroxyethylcellulose of claim 2 substituted with 0.1 to 25% of one 3-alkoxy-2-hydroxypropyl group.
Claim 8
Dependent Claim
16 words
The nonionic, water-soluble 3-alkoxy-2-hydroxypropylhydroxyethylcellulose of claim 3 substituted with 0.1 to 25% of one 3-alkoxy-2-hydroxypropyl group.
Claim 9
Dependent Claim
16 words
The nonionic, water-soluble 3-alkoxy-2-hydroxypropylhydroxyethylcellulose of claim 4 substituted with 0.I to 25% of one 3-alkoxy-2-hydroxypropyl group.
Claim 10
Dependent Claim
19 words
The nonionic, water-soluble 3-alkoxy-2-hydroxypropylhydroxyethylcellulose of claim 1 having a degree of polymerization of from about 1500 to about 4000.
Claim 11
Dependent Claim
19 words
The nonionic, water-soluble 3-alkoxy-2-hydroxypropylhydroxyethylcellulose of claim 2 having a degree of polymerization of from about 1500 to about 4000.
Claim 12
Dependent Claim
19 words
The nonionic, water-soluble 3-alkoxy-2-hydroxypropylhydroxyethylcelluose of claim 3 having a degree of polymerization of from about 1500 to about 4000.
Claim 13
Dependent Claim
19 words
The nonionic, water-soluble 3-alkoxy-2-hydroxypropylhydroxyethylcellulose of claim 6 having a degree of polymerization of from about 1500 to about 4000.
Claim 14
Dependent Claim
19 words
The nonionic, water-soluble 3-alkoxy-2-hydroxypropylhydroxyethylcellulose of claim 8 having a degree of polymerization of from about 1500 to about 4000.
Claim 15
Dependent Claim
15 words
The nonionic, water-soluble 3-alkoxy-2-hydroxypropylhydroxyethylcellulose of claim 1 wherein the alkyl group is an n-butyl group.
Claim 16
Dependent Claim
18 words
The nonionic, water-soluble 3-alkoxy-2-hydroxypropylhydroxyethylcellulose of claim 14 having a hydroxyethyl M.S. of from about 1.5 to about 3.5.
Claim 17
Dependent Claim
16 words
The nonionic, water-soluble 3-alkoxy-2-hydroxypropylhydroxyethylcellulose of claim 14 substituted with 0.1 to 25% of one 3-alkoxy-2-hydroxypropyl group.
Claim 18
Dependent Claim
16 words
The nonionic, water-soluble 3-alkoxy-2-hydroxypropylhydroxyethylcellulose of claim 15 substituted with 0.1 to 25% of one 3-alkoxy-2-hydroxypropyl group.
Claim 19
Dependent Claim
19 words
The nonionic, water-soluble 3-alkoxy-2-hydroxypropylhydroxyethylcellulose of claim 14 having a degree of polymerization of from about 1500 to about 4000.
Claim 20
Dependent Claim
19 words
The nonionic, water-soluble 3-alkoxy-2-hydroxypropylhydroxyethylcellulose of claim 15 having a degree of polymerization of from about 1500 to about 4000.
Claim 21
Dependent Claim
19 words
The nonionic, water-soluble 3-alkoxy-2-hydroxypropylhydroxyethylcellulose of claim 16 having a degree of polymerization of from about 1500 to about 4000.
Claim 22
Dependent Claim
19 words
The nonionic, water-soluble 3-alkoxy-2-hydroxypropylhydroxyethylcellulose of claim 17 having a degree of polymerization of from about 1500 to about 4000.
References Cited (Backward Citations)
US3091542A
Cited
US3272640A
Cited
US3435027A
Cited
US4009329A
Cited
US4065319A
Cited
US4228277B1
Cited
US4228277A
Cited
US4243802A
Cited
US4352916A
Cited
US4501617A
Cited
US4485089A
Cited
US4558079A
Cited
US4584189A
Cited
US4654085A
Cited
US4629743A
Cited
EP0281360A1
Cited
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) | 1992-07-03 | 1993-01-02 | 1993-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-03 | 1997-01-02 | 1997-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-03 | 2001-01-02 | 2001-07-04 | $7700.00 | Window Closed / Lapsed |