US3963434A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carboxymethylated cotton fabric with improved conditioned and wet wrinkle recovery by reaction with propylene or ethylene carbonate
Assignee: United States Department of Agriculture
•
Filing: 1975-07-23
•
Granted: 1976-06-15
•
Expires: 1995-07-23
Abstract
Abstract Partially carboxymethylated-cotton fabric prepared by a non-aqueous procedure is reacted with either ethylene carbonate or propylene carbonate in a heated, evacuated oven. The product of either reaction is a fabric with high conditioned and high wet wrinkle recovery.
Inventors
- 👤 Truman L. Ward
- 👤 Ruth R. Benerito
- 👤 Dorothy M. Perrier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:25
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/10; D06M13/224; D06M13/232; Y; Y10; Y10S; Y10S8/00; Y10S8/11
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
139 words
A process for imparting high conditioned (dry) and high wet wrinkle recovery to partially carboxymethylated-cotton fabric, the process comprising: a. impregnating a cotton fabric which has been carboxymethylated to a degree of substitution of about from 0.1 to 0.3 by a non-aqueous procedure, with a neat heterocyclic carbonate selected from the group consisting of ethylene carbonate, propylene carbonate, and a mixture of ethylene and propylene carbonate, to a pickup of about 100%, b. placing the wet, impregnated CMC fabric in a vacuum oven preheated to a temperature of about from 160° to 180° , c. evacuating the oven to obtain a pressure of about 35 mm of mercury, d. maintaining the temperature and vacuum for about from 30 to 120 minutes to obtain reaction, and e. releasing the vacuum and washing the reacted fabric to remove all unreacted material.
Claim 2
Dependent Claim
139 words
A process for imparting high conditioned (dry) and high wet wrinkle recovery to partially carboxymethylated-cotton fabric, the process comprising: a. impregnating a cotton fabric which has been carboxymethylated to a degree of substitution of about from 0.1 to 0.3 by a non-aqueous procedure, with a neat heterocyclic carbonate selected from the group consisting of ethylene carbonate, propylene carbonate, and a mixture of ethylene and propylene carbonate, to a pickup of about 100%, b. placing the wet, impregnated CMC fabric in a vacuum oven preheated to a temperature of about from 160° to 180° , c. evacuating the oven to obtain a pressure of about 35 mm of mercury, d. maintaining the temperature and vacuum for about from 30 to 120 minutes to obtain reaction, and e. releasing the vacuum and washing the reacted fabric to remove all unreacted material.
Claim 3
Dependent Claim
12 words
The process of claim 1 wherein the heterocyclic carbonate is ethylene carbonate.
Claim 4
Dependent Claim
12 words
The process of claim 1 wherein the heterocyclic carbonate is propylene carbonate.
Claim 5
Dependent Claim
17 words
The process of claim 1 wherein the heterocyclic carbonate is a mixture of ethylene and propylene carbonate.
References Cited (Backward Citations)
US3617197A
Cited
US3918899A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-15 | 1979-12-15 | 1980-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-15 | 1983-12-15 | 1984-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-15 | 1987-12-15 | 1988-06-15 | $7700.00 | Window Closed / Lapsed |