Patent US2335838A successfully refreshed from Google Patents.
Patent US3917449A successfully refreshed from Google Patents.
US3917449A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polythioureas to inhibit ozone fading of dyed polyamides
Assignee: Honeywell International Inc
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Filing: 1974-02-11
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Granted: 1975-11-04
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Expires: 1994-02-11
Abstract
Abstract When from about 0.5 percent to about 5 percent of a polythiourea is coated on nylon fiber an improved dye fastness is achieved compared to untreated dyed nylon fiber when this fiber is exposed to ozone.
Inventors
- 👤 Rodney Lee Wells
- 👤 Robert Alden Lofquist
- 👤 Stanley David Lazarus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:19
CPC Classifications
D; D06; D06P; D06P3/00; D06P3/02; D06P3/04; D06P3/24; D06P1/00; D06P1/44; D06P1/52; D06P1/5264; D06P1/5285; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/924; Y10S8/929; Y10T; Y10T442/00; Y10T442/20; Y10T442/2549; Y10T442/2557
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
34 words
A METHOD FOR IMPROVING FASTNESS OF DYES WHEN EXPOSED TO OZONE IN POLYCARBONAMIDE FIBERS DYED WITH ANTHRAQUINONE DYES CONSISTING OF COATING SAID FIBERS WITH A SUBSTANCE CONSISTING ESSENTIALLY OF A COMPOUND HAVING A FORMULA
Claim 2
Independent Claim
34 words
A METHOD FOR IMPROVING FASTNESS OF DYES WHEN EXPOSED TO OZONE IN POLYCARBONAMIDE FIBERS DYED WITH ANTHRAQUINONE DYES CONSISTING OF COATING SAID FIBERS WITH A SUBSTANCE CONSISTING ESSENTIALLY OF A COMPOUND HAVING A FORMULA
Claim 3
Dependent Claim
20 words
The method of claim 1 wherein R is a difunctional fatty acid residue moiety of 24 to 108 carbon atoms.
Claim 4
Dependent Claim
21 words
The method of claim 2 wherein R1, R2, R3, R4 are lower allyl or alkyl having 1 to 8 carbon atoms.
Claim 5
Dependent Claim
20 words
The method of claim 1 wherein R1, R2, R3 and R4 are lower alkyl having 1 to 8 carbon atoms.
Claim 6
Dependent Claim
15 words
The method of claim 1 wherein said coating is applied prior to dyeing said fiber.
Claim 7
Dependent Claim
15 words
The method of claim 1 wherein said coating is applied subsequent to dyeing said fiber.
Claim 8
Dependent Claim
12 words
The method of claim 1 wherein said anthraquinone dyes are disperse dyes.
Claim 9
Dependent Claim
12 words
The method of claim 1 wherein said anthraquinone dyes are cationic dyes.
Claim 10
Dependent Claim
31 words
A polycarbonamide fabric dyed with anthraquinone dyes coated with from about 0.5 to about 5 percent on weight of fabric of a substance consisting essentially of a compound having the formula
Claim 11
Dependent Claim
31 words
A polycarbonamide fabric dyed with anthraquinone dyes coated with from about 0.5 to about 5 percent on weight of fabric of a substance consisting essentially of a compound having the formula
Claim 12
Dependent Claim
10 words
The fabric of claim 9 wherein said fabric is carpet.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-03 | 1979-05-05 | 1979-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-03 | 1983-05-05 | 1983-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-03 | 1987-05-05 | 1987-11-04 | $7700.00 | Window Closed / Lapsed |