US5643585A
Expired / Lapsed
US
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Coloring materials
Assignee: Ben Gurion University of the Negev Research and Development Authority Ltd
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Filing: 1995-07-18
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Granted: 1997-07-01
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Expires: 2015-07-18
Abstract
Abstract A non-soluble particulate coloring material comprises dry ground red microalgae-derived material as the base coloring matter.
Inventors
- 👤 Shoshana Arad
- 👤 Anina Yaron
- 👤 Ephraim Cohen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:36
CPC Classifications
A; A61; A61Q; A61Q1/00; A61Q1/02; A23; A23L; A23L5/00; A23L5/40; A23L5/42; A23L5/43; A61K; A61K8/00; A61K8/18; A61K8/96; A61K8/97; A61K8/9706; A61K8/9717; A61Q1/12; C; C09; C09B; C09B61/00; A61K2800/00; A61K2800/40; A61K2800/41; A61K2800/412; A61K2800/42; A61K2800/43; A61K2800/80
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
16 words
A non-soluble particulate coloring material comprising dry ground red microalgae-derived material as the base coloring matter.
Claim 2
Dependent Claim
16 words
A non-soluble particulate coloring material comprising dry ground red microalgae-derived material as the base coloring matter.
Claim 3
Dependent Claim
23 words
A coloring material according to claim 1, in the form of a powder having a mean particle diameter of 50 μm or less.
Claim 4
Dependent Claim
19 words
A coloring material according to claim 1, wherein the red microalga is selected from the genus Porphyridium or Rhodella.
Claim 5
Dependent Claim
26 words
A cosmetic preparation consisting essentially of a powder as claimed in claim 2, optionally in compressed form, alone or together with cosmetically acceptable additives and/or carriers.
Claim 6
Dependent Claim
13 words
A cosmetic preparation containing as the coloring agent the material of claim 1.
Claim 7
Dependent Claim
13 words
A food preparation containing as the coloring agent the material of claim 1.
Claim 8
Dependent Claim
58 words
A process for preparing a coloring material, comprising cultivating a red microalgae to produce a biomass, and then carrying out, in any convenient order, the steps of: a) extracting undesirable extractable materials from the algal body; b) removing water from the algal body; c) grinding the red microalgae, preferably to a particle size of 50 μm or less.
Claim 9
Dependent Claim
58 words
A process for preparing a coloring material, comprising cultivating a red microalgae to produce a biomass, and then carrying out, in any convenient order, the steps of: a) extracting undesirable extractable materials from the algal body; b) removing water from the algal body; c) grinding the red microalgae, preferably to a particle size of 50 μm or less.
Claim 10
Dependent Claim
13 words
A process according to claim 7, wherein water removal is effected by freeze-drying.
Claim 11
Dependent Claim
31 words
A process according to claim 7, wherein the dried algae are extracted prior to grinding with a volatile organic solvent, to remove undesired pigments such as chlorophyll and carotenoids, and impurities.
Claim 12
Dependent Claim
12 words
A process according to claim 9, wherein the organic solvent is acetone.
Claim 13
Dependent Claim
26 words
A process according to claim 7, wherein water removal is effected by extracting the wet algae with a polar solvent, followed by vaporization of the solvent.
Claim 14
Dependent Claim
16 words
A process according to claim 11, wherein the solvent is selected from acetone, alcohols and isopropanol.
Claim 15
Dependent Claim
54 words
A process for preparing a coloring material having a desired color, comprising: a) selecting a red microalga; b) growing the red microalga under conditions suitable for increasing or reducing the content of phycobiliprotein therein; and c) harvesting the algae, removing water therefrom and grinding the same, to obtain a powder having the desired color.
Claim 16
Dependent Claim
54 words
A process for preparing a coloring material having a desired color, comprising: a) selecting a red microalga; b) growing the red microalga under conditions suitable for increasing or reducing the content of phycobiliprotein therein; and c) harvesting the algae, removing water therefrom and grinding the same, to obtain a powder having the desired color.
Claim 17
Dependent Claim
16 words
A process according to claim 13, further comprising lowering the pH of the biomas after harvest.
Claim 18
Dependent Claim
15 words
A process according to claim 14, wherein the pH is lowered by adding an acid.
Claim 19
Dependent Claim
17 words
A process according to claim 15, wherein the acid is HCl or H 3 PO 4 .
Claim 20
Dependent Claim
23 words
A method for increasing the stability of coloring materials as claimed in claim 1 comprising treating the algal raw material with an acid.
Claim 21
Dependent Claim
24 words
A method for improving the color intensity of coloring materials as claimed in claim 1 comprising treating the algal raw material with an acid.
Claim 22
Dependent Claim
17 words
A colored product containing as a coloring material a material according to any one of claim 1.
Claim 23
Dependent Claim
14 words
A coloring material, whenever prepared by the process of any one of claim 7.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-06-30 | 2000-12-30 | 2001-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-06-30 | 2004-12-30 | 2005-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-06-30 | 2008-12-30 | 2009-07-01 | $7700.00 | Window Closed / Lapsed |