US3634119A
Expired / Lapsed
US
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Nacreous pigment compositions
Assignee: EIDP Inc
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Filing: 1969-12-10
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Granted: 1972-01-11
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Expires: 1989-12-10
Abstract
Abstract Nacreous pigment exhibiting interference colors and a high degree of opacity, composed of a metal oxide, such as titanium dioxide, in particulate form on mica substrate, at least part of the mica substrate being calcined; and a process of preparing the pigment.
Inventors
- 👤 Edward F Klenke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:20
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/0015; C09C1/0021; C09C1/0018; C01; C01P; C01P2004/00; C01P2004/60; C01P2004/61; C09C2200/00; C09C2200/10; C09C2200/102; C09C2200/30; C09C2200/302; C09C2200/50; C09C2200/505
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
30 words
A nacreous pigment of claim 1 wherein the metal oxide is titanium dioxide and is in an amount from about 30 to about 75 percent by weight of the pigment.
Claim 2
Dependent Claim
31 words
A nacreous pigment of claim 1 wherein the portion of mica substrate that has been subjected to calcination is from about 10 to 100 percent by weight of the mica substrate.
Claim 3
Dependent Claim
104 words
A process of making a nacreous pigment having a particulate metal oxide layer on mica substrate, comprising a. calcining mica substrate at a temperature of from about 550* C. to about 1,000* C. for a period of from about 5 minutes to 2 hours; and b. depositing on the resulting calcined mica substrate particles of metal oxide as a translucent layer of from about 20 to 250 millimicrons in thickness, said metal oxide being selected from the group consisting of hydrous titanium dioxide, titanium dioxide, hydrous zirconium dioxide and zirconium dioxide, and said metal oxide particles are less than 0.1 micron in particLe size.
Claim 4
Dependent Claim
32 words
A process of claim 4 wherein the mica substrate is in flake form all of which passes 140 mesh screen and has a size, in major dimension, of at least 5 micron.
Claim 5
Dependent Claim
31 words
A process of claim 4 wherein uncalcined mica substrate is blended with the calcined mica substrate and said metal oxide is deposited as a layer on the mica in said blend.
Claim 6
Dependent Claim
18 words
A process of claim 6 wherein at least 10 percent of the mica substrate blend is calcined mica.
Claim 7
Dependent Claim
29 words
A process of claim 4 wherein calcined mica substrate having the metal oxide layer deposited thereon is blended with uncalcined mica substrate having a metal oxide layer deposited thereon.
References Cited (Backward Citations)
US3087828A
Cited
US3372047A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |