US6063179A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Goniochromatic gloss pigments based on coated silicon dioxide platelets
Assignee: BASF SE
•
Filing: 1997-04-03
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Granted: 2000-05-16
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Expires: 2017-04-03
Abstract
Abstract Goniochromatic luster pigments based on silicon dioxide platlets, CVD coated with A) a nonselectively absorbing filmlike layer at least partially transparent to visible light, and B) if desired an outer layer which consists essentially of colorless or selectively absorbing metal oxide and/or comprises phosphate, chromate and/or vanadate, are prepared and used for coloring paints, inks, including printing inks, plastics, glasses, ceramic products and decorative cosmetic preparations.
Inventors
- 👤 Raimund Schmid
- 👤 Norbert Mronga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:29
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/80; C04B41/81; C04B41/89; A; A61; A61K; A61K8/00; A61K8/02; A61K8/0241; A61K8/18; A61K8/19; A61K8/25; A61Q; A61Q1/00; A61Q1/02; C03; C03C; C03C1/00; C03C1/10; C04B41/45; C04B41/52; C08; C08K; C08K9/00; C08K9/02; C09; C09C; C09C1/00; C09C1/0015; C09C1/0078; A61K2800/00; A61K2800/40; A61K2800/41; A61K2800/412; A61K2800/42; A61K2800/43; A61K2800/436; A61K2800/60; A61K2800/61; A61K2800/62; A61K2800/621; A61K2800/65; A61K2800/651; C01; C01P; C01P2004/00; C01P2004/20; C01P2004/24; C01P2004/80; C01P2004/82; C01P2004/84; C09C2200/00; C09C2200/10; C09C2200/1004; C09C2200/1008; C09C2200/1075; C09C2200/1079; C09C2200/30; C09C2200/306; C09C2200/307; C09C2200/40; C09C2200/401
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
62 words
A goniochromatic luster pigment based on silicon dioxide platelets, CVD coated with: A) a nonselectively absorbing film layer at least partially transparent to visible light; B) Optionally an outer layer which comprises colorless or selectively absorbing metal oxides, phosphates, chromates or vanadates or any combination thereof; wherein the silicon dioxide platelets are already coated with an inner, colorless, reflective metal oxide layer.
Claim 2
Dependent Claim
62 words
A goniochromatic luster pigment based on silicon dioxide platelets, CVD coated with: A) a nonselectively absorbing film layer at least partially transparent to visible light; B) Optionally an outer layer which comprises colorless or selectively absorbing metal oxides, phosphates, chromates or vanadates or any combination thereof; wherein the silicon dioxide platelets are already coated with an inner, colorless, reflective metal oxide layer.
Claim 3
Dependent Claim
20 words
The luster pigment of claim 1, wherein said layer (A) comprises metals of nonselectively absorbing metal compounds or mixtures thereof.
Claim 4
Dependent Claim
25 words
The luster pigment of claim 2, wherein said nonselectively absorbing compounds comprise metal sulfides, metal oxides, metal nitrides or metal silicides or any combination thereof.
Claim 5
Dependent Claim
20 words
The luster pigment of claim 1, wherein the silicon dioxide platelets are colored by incorporation of inorganic or organic colorants.
Claim 6
Dependent Claim
18 words
The luster pigment of claim 1, wherein said layer (A) is from 1 to 50 nm in thickness.
Claim 7
Dependent Claim
18 words
The luster pigment of claim 1, wherein said layer (B) is from 1 to 400 nm in thickness.
Claim 8
Dependent Claim
17 words
The luster pigment of claim 1, wherein said film layer (A) completely enrobes the silicon dioxide platelets.
Claim 9
Dependent Claim
20 words
The luster pigment of claim 1, wherein said silicon dioxide platelets have a diameter of from 1 to 250 μm.
Claim 10
Dependent Claim
20 words
The luster pigment of claim 8, wherein said silicon dioxide platelets have a diameter of from 0.05 to 5 μm.
Claim 11
Dependent Claim
20 words
The luster pigment of claim 9, wherein said silicon dioxide platelets have a diameter of from 0.2 to 2 μm.
Claim 12
Dependent Claim
25 words
The luster pigment of claim 1, wherein said color, reflective metal oxide layer comprises titanium dioxide having a thickness of from 5 to 200 nm.
Claim 13
Dependent Claim
38 words
A process for producing the luster pigment of claim 1, which comprises coating silicon dioxide platelets with a nonselectively adsorbing film layer at least partially transparent to visible light by chemical gas phase decomposition of vaporizable metal compounds.
Claim 14
Dependent Claim
29 words
The process of claim 12, which further comprises coating said silicon dioxide platelets with an outer layer which comprises metal oxides, sulfates, chromates or vanadates or any combination thereof.
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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) | 2003-05-16 | 2003-11-15 | 2004-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-05-16 | 2007-11-15 | 2008-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-05-16 | 2011-11-15 | 2012-05-16 | $7700.00 | Window Closed / Lapsed |