Patent US3640676A successfully refreshed from Google Patents.
US3640676A
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Process for shrinkproofing wool
Assignee: Ashland LLC
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Filing: 1969-10-10
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Granted: 1972-02-08
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Expires: 1989-10-10
Abstract
Abstract Linear addition polymers having multiple N, N-ethylene ureido functionality are employed to impregnate a wool or woolcontaining substrate to provide a treated substrate exhibiting excellent dimensional stability characteristics.
Inventors
- 👤 William J Mckillip
- 👤 Billy M Culbertson
- 👤 Clarence N Impola
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:20
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/61; C; C08; C08F; C08F20/00; C08F20/02; C08F20/52; C08F20/54; C08F20/60; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/2805; C08G18/285; C08G18/2865; C08G18/287; C08G18/70; C08G18/701; C09; C09D; C09D125/00; C09D125/02; C09D125/04; C09D125/08; C09D125/14; C09J; C09J125/00; C09J125/02; C09J125/04; C09J125/08; C09J125/14; C08L; C08L2666/00; C08L2666/28
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
19 words
A process in accordance with claim 1 wherein said carbon atoms of the addition copolymer are tertiary carbon atoms.
Claim 2
Dependent Claim
19 words
A process in accordance with claim 2 wherein said pendant N, N-ethylene ureido groups correspond to the structural formula:
Claim 3
Dependent Claim
36 words
A process in accordance with claim 3 wherein the R2, R3 and R4 substituents of the pendant N,N-ethylene ureido groups of said addition copolymer are each hydrogeN and the R5 substituent is either hydrogen or methyl.
Claim 4
Dependent Claim
22 words
A process in accordance with claim 4 wherein said addition copolymer contains from about 0.1-50 weight percent of the N,N-ethylene ureido moiety.
Claim 5
Dependent Claim
20 words
A process in accordance with claim 4 wherein the weight percent of the N,N-ethylene ureido moiety is from 0.5-10 percent.
Claim 6
Dependent Claim
27 words
A process in accordance with claim 6 wherein the amount of the addition copolymer deposited is from about 1-20 percent based on the weight of the substrate.
Claim 7
Dependent Claim
20 words
A process in accordance with claim 7 wherein said substrate is in the form of a woven or knit fabric.
Claim 8
Dependent Claim
49 words
A process in accordance with claim 8 wherein the comonomeric residue units of said copolymer which are devoid of N,N-ethylene ureido substituents are derived via addition polymerization from a comonomer selected from the group consisting of a C1-C22 alkyl acrylate, a C1-C22 methacrylate, a vinyl ester and mixtures thereof.
Claim 9
Dependent Claim
23 words
A process in accordance with claim 9 wherein the pendant N, N-ethylene ureido groups of said addition copolymer correspond to the structural formula:
References Cited (Backward Citations)
US3516781A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |