Patent US4238191A successfully refreshed from Google Patents.
US4238191A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bulking of polycarbonamides: qiana
Assignee: Burlington Industries Inc
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Filing: 1979-11-26
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Granted: 1980-12-09
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Expires: 1999-11-26
Abstract
Abstract A process for bulking linear polycarbonamide fibers which comprises treating the same with a solution or dispersion of an alcohol, thereafter washing in hot and cold water and drying.
Inventors
- 👤 Samir Hussamy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:41
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/10; D06M13/144; D06M13/148; D06M13/152
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
84 words
A process for permanently bulking and stabilizing as well as developing the silk-like handle of linear polycarbonamide fibers consisting essentially of sequential steps of: (1) treating linear polycarbonamide fibers, wherein 90% of the repeating unit in said fibers have the formula: ##STR4## wherein R is hydrogen or methyl, with a solution or emulsion of an alcohol; (2) washing the fibers in hot water; (3) washing the fibers in cold water; (4) drying the washed fibers; and thereafter (5) dyeing the thus-bulked and stabilized fibers.
Claim 2
Dependent Claim
84 words
A process for permanently bulking and stabilizing as well as developing the silk-like handle of linear polycarbonamide fibers consisting essentially of sequential steps of: (1) treating linear polycarbonamide fibers, wherein 90% of the repeating unit in said fibers have the formula: ##STR4## wherein R is hydrogen or methyl, with a solution or emulsion of an alcohol; (2) washing the fibers in hot water; (3) washing the fibers in cold water; (4) drying the washed fibers; and thereafter (5) dyeing the thus-bulked and stabilized fibers.
Claim 3
Dependent Claim
17 words
The process of claim 1 wherein said solution or dispersion contains 1-100% by weight of said alcohol.
Claim 4
Dependent Claim
19 words
The process of claim 2 wherein said alcohol is selected from the group consisting of aromatic and aliphatic alcohols.
Claim 5
Dependent Claim
25 words
The process of claim 1, wherein said fibers are treated with said solution or emulsion for a period of about 1 to about 10 minutes.
Claim 6
Dependent Claim
26 words
The process of claim 1, wherein said solution or emulsion of an alcohol is kept at a temperature of from about 20° to about 25° C.
Claim 7
Dependent Claim
35 words
The process of claim 1, wherein said fibers are washed in hot water at a temperature of from 40° to 100° C. and thereafter cool water at a temperature of from 10° to 20° C.
Claim 8
Dependent Claim
69 words
A process for permanently bulking and stabilizing as well as developing the silk-like handle of linear polycarbonamide fibers which comprises treating linear polycrabonamide fibers wherein 90% of the repeating unit in said fibers have the formula: ##STR5## wherein R is hydrogen or methyl with a solution or emulsion of an alcohol, said solution or emulsion being substantially devoid of dyestuff, thereafter washing in hot and cold water and drying.
Claim 9
Dependent Claim
69 words
A process for permanently bulking and stabilizing as well as developing the silk-like handle of linear polycarbonamide fibers which comprises treating linear polycrabonamide fibers wherein 90% of the repeating unit in said fibers have the formula: ##STR5## wherein R is hydrogen or methyl with a solution or emulsion of an alcohol, said solution or emulsion being substantially devoid of dyestuff, thereafter washing in hot and cold water and drying.
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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) | 1983-12-09 | 1984-06-09 | 1984-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-09 | 1988-06-09 | 1988-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-09 | 1992-06-09 | 1992-12-09 | $7700.00 | Window Closed / Lapsed |