US3967922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Granular dyestuff preparations based on polyvinylalcohol as the carrier
Assignee: Bayer AG
•
Filing: 1974-08-08
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Granted: 1976-07-06
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Expires: 1994-08-08
Abstract
Abstract Pulverulent or granular dyestuff preparations containing water-soluble dyestuffs and polyvinyl alcohol are suitable for the preparation of concentrated dyestuff solutions in water, water-soluble organic solvents or in mixtures thereof.
Inventors
- 👤 Karlheinz Wolf
- 👤 Reinhold Hornle
- 👤 Hans Kunzelmann
- 👤 Theodor Hild
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:02
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/0071; C09B67/0092; C09B67/0083
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
31 words
A pulverulent or granular composition consisting essentially of a. a water-soluble dyestuff; and b. polyvinyl alcohol in the amount of from about 5% to about 100% by weight of said dyestuff.
Claim 2
Dependent Claim
31 words
A pulverulent or granular composition consisting essentially of a. a water-soluble dyestuff; and b. polyvinyl alcohol in the amount of from about 5% to about 100% by weight of said dyestuff.
Claim 3
Dependent Claim
26 words
The composition of claim 1 wherein said polyvinyl alcohol is present in the amount of from about 10% to about 100% by weight of said dyestuff.
Claim 4
Dependent Claim
63 words
A concentrated dyestuff solution which is substantially non-gelling above about 26°C consisting essentially of: a. water, or a water-soluble organic solvent or a mixture thereof; b. a water-soluble dyestuff in the amount of from about 5% to about 60% by weight of said solution; and c. polyvinyl alcohol in the amount of from about 5% to about 100% by weight of said dyestuff.
Claim 5
Dependent Claim
63 words
A concentrated dyestuff solution which is substantially non-gelling above about 26°C consisting essentially of: a. water, or a water-soluble organic solvent or a mixture thereof; b. a water-soluble dyestuff in the amount of from about 5% to about 60% by weight of said solution; and c. polyvinyl alcohol in the amount of from about 5% to about 100% by weight of said dyestuff.
Claim 6
Dependent Claim
68 words
A process for the production of a concentrated dyestuff solution which is substantially non-gelling above about 26°C comprising dissolving a dry-pulverized dyestuff and polyvinyl alcohol in the amount of from about 5% to about 100% by weight of said dyestuff in a sufficient amount of water, water-soluble organic solvent or mixtures thereof to produce a solution containing from about 5% to about 60% by weight of said dyestuff.
Claim 7
Dependent Claim
68 words
A process for the production of a concentrated dyestuff solution which is substantially non-gelling above about 26°C comprising dissolving a dry-pulverized dyestuff and polyvinyl alcohol in the amount of from about 5% to about 100% by weight of said dyestuff in a sufficient amount of water, water-soluble organic solvent or mixtures thereof to produce a solution containing from about 5% to about 60% by weight of said dyestuff.
References Cited (Backward Citations)
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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) | 1979-07-06 | 1980-01-05 | 1980-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-06 | 1984-01-05 | 1984-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-06 | 1988-01-05 | 1988-07-06 | $7700.00 | Window Closed / Lapsed |