US4525168A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating polyaramid fiber
Assignee: NOVO Corp A CORP OF NY
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Filing: 1984-01-27
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Granted: 1985-06-25
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Expires: 2004-01-27
Abstract
Abstract Polyaramid fiber is swollen, such as by exposing it to a solvent, and while swollen a substance, such as amine or substituted amine, capable of forming an ionic bond with an acid or anionic dye, is introduced into the fiber, after which the fiber is shrunk, such as by drying, to incorporate the substance into it. Thereafter, the fiber can be dyed or printed with an anionic dye. A solution of the solvent and substance may be prepared, and the fiber contacted with the solution.
Inventors
- 👤 David R. Kelly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:05
CPC Classifications
D; D06; D06P; D06P5/00; D06P5/22; D06M; D06M13/00; D06M13/322; D06M13/325; D06P3/00; D06P3/02; D06P3/04; D06P3/24; D06P3/241
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
43 words
A method of treating polyaramid fiber, comprising the steps of: swelling the fiber, introducing into the swollen fiber a substance capable of forming an ionic bond with an anionic dye, and shrinking the fiber so as to incorporate said substance into the fiber.
Claim 2
Independent Claim
43 words
A method of treating polyaramid fiber, comprising the steps of: swelling the fiber, introducing into the swollen fiber a substance capable of forming an ionic bond with an anionic dye, and shrinking the fiber so as to incorporate said substance into the fiber.
Claim 3
Dependent Claim
18 words
A method as defined in claim 1 wherein the fiber is swelled by exposing it to a solvent.
Claim 4
Dependent Claim
24 words
A method as defined in claim 2 wherein the solvent is selected from the group consisting of dimethyl formamide, dimethyl sulfoxide, and dimethyl acetamide.
Claim 5
Dependent Claim
16 words
A method as defined in claim 1 wherein said substance is an amine or substituted amine.
Claim 6
Dependent Claim
53 words
A method as defined in claim 4 wherein said amine or substituted amine is an aliphatic compound having the general formula H 2 N--(CH 2 ) x --NH 2 or R'N--(CH 2 ) x --NR, where R and R' are any aliphatic or aromatic substitutions, and x is the number of methyl groups.
Claim 7
Dependent Claim
37 words
A method as defined in claim 4 wherein said amine or substituted amine is an aromatic compound having the general formula H 2 N--Ar--NH 2 or R'N--Ar--NR, where R and R' are any aliphatic or aromatic substitution.
Claim 8
Dependent Claim
17 words
A method as defined in claim 1 including exposing the fiber, after shrinking, to an anionic dye.
Claim 9
Independent Claim
62 words
A method of treating polyaramid fiber, comprising the steps of: exposing the fiber to a solvent which causes the fiber to swell, while the fiber is swollen, exposing it to an amine or substituted amine capable of forming an ionic bond with an anionic dye so that the amine permeates the fiber, and drying the fiber to incorporate the amine into it.
Claim 10
Independent Claim
62 words
A method of treating polyaramid fiber, comprising the steps of: exposing the fiber to a solvent which causes the fiber to swell, while the fiber is swollen, exposing it to an amine or substituted amine capable of forming an ionic bond with an anionic dye so that the amine permeates the fiber, and drying the fiber to incorporate the amine into it.
Claim 11
Dependent Claim
37 words
A method as defined in claim 8 including preparing a solution of the amine or substituted amine in the solvent, and exposing the fiber to the solvent and amine simultaneously by contacting the fiber with the solution.
Claim 12
Dependent Claim
31 words
A method as defined in claim 9 wherein the solution contains from 1 to 50 parts of the amine or substituted amine and from 99 to 50 parts of the solvent.
Claim 13
Dependent Claim
18 words
A method as defined in claim 9 wherein the solution contains 10% of the amine or substituted amine.
References Cited (Backward Citations)
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US3564630A
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US3630662A
Cited
US3549789A
Cited
US3771949A
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US3942950A
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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) | 1988-06-24 | 1988-12-24 | 1989-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-24 | 1992-12-24 | 1993-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-24 | 1996-12-24 | 1997-06-25 | $7700.00 | Window Closed / Lapsed |