US3607358A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of dyeing a polyurethane surface layer coated on a substrate and resultant product
Assignee: Glanzstoff AG
•
Filing: 1968-12-18
•
Granted: 1971-09-21
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Expires: 1988-12-18
Abstract
Abstract Method of dyeing a polyurethane surface layer of an artificial leather by applying thereto a spirit-soluble dye dissolved in a mixture of organic solvents including at least one solvent which is a swelling agent for the polyurethane.
Inventors
- 👤 Friedrich Dangl
- 👤 Klaus Gerlach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:36
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0004; C08K; C08K3/00; C08K3/01; C08K3/013; D; D06; D06N; D06N3/00; D06N3/0056; D06N3/0065; D06P; D06P1/00; D06P1/90; D06P1/92; D06P1/928; C08J2375/00; C08J2375/04; Y; Y10; Y10S; Y10S428/00; Y10S428/904; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
17 words
A method as claimed in claim 1 wherein said spirit-soluble dye is a metal complex azo dyestuff.
Claim 2
Dependent Claim
51 words
A method as claimed in claim 1 wherein said mixture of organic solvents includes at least one solvent with an evaporation number between 1 and 10, at least one solvent with an evaporation number between 10 and 20 and at least one solvent with an evaporation number between 20 and 100.
Claim 3
Dependent Claim
17 words
A method as claimed in claim 3 wherein said spirit-soluble dye is a metal complex azo dyestuff.
Claim 4
Dependent Claim
23 words
A method as claimed in claim 1 wherein said mixture of organic solvents consists essentially of acetone, butyl acetate and methyl Cellosolve acetate.
Claim 5
Dependent Claim
17 words
A method as claimed in claim 5 wherein said spirit-soluble dye is a metal complex azo dyestuff.
Claim 6
Dependent Claim
18 words
A method as claimed in claim 1 wherein the dye solution is sprayed onto the polyurethane surface layer.
Claim 7
Dependent Claim
10 words
The dyed product obtained by the method of claim 1.
Claim 8
Dependent Claim
29 words
A method as claimed in claim 1 wherein, after drying, a sealing lacquer is applied to the dyed layer in admixture with a minor proportion of said dye solution.
Claim 9
Dependent Claim
32 words
A method as claimed in claim 1 wherein the steps of application of the dye solution and drying are carried out at about room temperature up to not more than 90* C.
Claim 10
Dependent Claim
21 words
A method as claimed in claim 1 wherein said mixture of organic solvents consists essentially of acetone, butyl acetate and n-butanol.
Claim 11
Dependent Claim
22 words
A method as claimed in claim 1 wherein said mixture of organic solvents consists essentially of acetone, methyl isobutyl ketone and n-butanol.
Claim 12
Dependent Claim
30 words
A method as claimed in claim 1 wherein the proportion of said organic solvent which is a swelling agent for said polyurethane is approximately 10 to 50 percent by volume.
References Cited (Backward Citations)
CA756481A
Cited
US2888450A
Cited
US3116278A
Cited
US3100721A
Cited
US3180853A
Cited
US3262805A
Cited
US3337289A
Cited
US3501326A
Cited
US3496001A
Cited
US3481767A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |