US3934973A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Finely divided colorants
Assignee: Honeywell International Inc
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Filing: 1971-09-20
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Granted: 1976-01-27
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Expires: 1991-09-20
Abstract
Abstract Finely divided colorant compositions capable of uniform distribution throughout a dry, solid particulate material, such as a cleaning composition, are prepared by forming a solution of the desired colorant, adding a finely divided, inert substrate material and spray drying the resultant slurry.
Inventors
- 👤 Andrew Shultz
- 👤 Leslie C. Wizemann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:10
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/40; C09; C09B; C09B63/00; C09B67/00; C09B67/0001; C09B67/0003
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
73 words
A process for preparing a finely-divided, easily dispersible colorant composition which comprises preparing a slurry of a substrate consisting essentially of a finely-divided, inert, water-insoluble inorganic material in a solution of a dyestuff, removing the solvent from said slurry by atomizing said slurry into a stream of heated gas and recovering the resulting dried product as a free-flowing particulate composition of said inert substrate having said dyestuff evenly dispersed on the surface thereof.
Claim 2
Dependent Claim
73 words
A process for preparing a finely-divided, easily dispersible colorant composition which comprises preparing a slurry of a substrate consisting essentially of a finely-divided, inert, water-insoluble inorganic material in a solution of a dyestuff, removing the solvent from said slurry by atomizing said slurry into a stream of heated gas and recovering the resulting dried product as a free-flowing particulate composition of said inert substrate having said dyestuff evenly dispersed on the surface thereof.
Claim 3
Dependent Claim
14 words
The process of claim 1 wherein the solution of dyestuff is an aqueous solution.
Claim 4
Dependent Claim
23 words
The process of claim 1 wherein the slurry comprises about 2 to 20 parts of substrate material per 100 parts of dyestuff solution.
Claim 5
Dependent Claim
14 words
The process of claim 1 wherein the dyestuff is a non-toxic, water soluble dyestuff.
Claim 6
Dependent Claim
31 words
The process of claim 1 wherein the amount of dyestuff in said solution is about 0.1 to 20% by weight based on the total weight of the dyestuff and the substrate.
Claim 7
Dependent Claim
23 words
The process of claim 1 wherein the substrate material has a particle size ranging from about 0.001 to about 250 microns in diameter.
Claim 8
Dependent Claim
17 words
The process of claim 1 wherein the temperature of the heated gas is about 100° to 300°C.
Claim 9
Dependent Claim
29 words
A spray-dried, free-flowing, finely-divided colorant composition comprising a substrate having a dyestuff evenly dispersed on the surface thereof, said substrate consisting essentially of a finely-divided inert water-insoluble inorganic material.
Claim 10
Dependent Claim
29 words
A spray-dried, free-flowing, finely-divided colorant composition comprising a substrate having a dyestuff evenly dispersed on the surface thereof, said substrate consisting essentially of a finely-divided inert water-insoluble inorganic material.
Claim 11
Dependent Claim
13 words
The composition of claim 8 wherein the dyestuff is a water soluble dyestuff.
Claim 12
Dependent Claim
22 words
A dry, solid particulate colored composition comprising a cleansing composition having uniformly dispersed therethrough a colorant composition as claimed in claim 9.
References Cited (Backward Citations)
CA703577A
Cited
US2768054A
Cited
GB807089A
Cited
US2785478A
Cited
US2844489A
Cited
US2986475A
Cited
US3573979A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-26 | 1979-07-28 | 1980-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-26 | 1983-07-28 | 1984-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-26 | 1987-07-28 | 1988-01-27 | $7700.00 | Window Closed / Lapsed |