Patent US4919922A successfully refreshed from Google Patents.
US4919922A
Expired / Lapsed
US
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Polyolefin-treated pigment and cosmetics containing the same
Assignee: Miyoshi Kasei Inc
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Filing: 1989-08-21
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Granted: 1990-04-24
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Expires: 2009-08-21
Abstract
Abstract Pigment with its surface coated with a polyolefin carrying-COOR groups (wherein R is hydrogen atom or a metal atom) is water-repellent and has very high affinity for oily cosmetic components. Cosmetic products containing said surface-treated pigment is excellent in spreadability and feeling.
Inventors
- 👤 Ryota Miyoshi
- 👤 Isao Imai
- 👤 Tadashi Sugaya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:09
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/72; A61K8/81; A61K8/8105; A61K8/8111; A61K8/02; A61K8/11; A61K8/19; A61K8/25; A61Q; A61Q1/00; A61Q1/02; C; C09; C09B; C09B67/00; C09B67/0001; C09B67/0004; C09B67/0008; C09B67/0013; C09C; C09C3/00; C09C3/10; C09C3/12; A61K2800/00; A61K2800/40; A61K2800/41; A61K2800/412; A61K2800/42; A61K2800/43; C01; C01P; C01P2004/00; C01P2004/80; C01P2006/00; C01P2006/90; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2998
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
106 words
A surface-treated pigment having excellent spreadability and feeling, said pigment consisting essentially of pigment particles, wherein the surfaces of the pigment particles are coated with a coating consisting essentially of a polyolefin which contains --COOR groups, wherein R is a metal atom selected from the group consisting of Al, Mg, Ca, Zn, Zr and Ti, said polyolefin containing --COOR groups having a molecular weight in the range from 500 to 20,000, and an acid value in the range from 5 to 100, the amount of said polyolefin containing --COOR groups being in the range from 0.5 to 10% by weight based on the weight of pigment.
Claim 2
Dependent Claim
106 words
A surface-treated pigment having excellent spreadability and feeling, said pigment consisting essentially of pigment particles, wherein the surfaces of the pigment particles are coated with a coating consisting essentially of a polyolefin which contains --COOR groups, wherein R is a metal atom selected from the group consisting of Al, Mg, Ca, Zn, Zr and Ti, said polyolefin containing --COOR groups having a molecular weight in the range from 500 to 20,000, and an acid value in the range from 5 to 100, the amount of said polyolefin containing --COOR groups being in the range from 0.5 to 10% by weight based on the weight of pigment.
Claim 3
Dependent Claim
43 words
A pigment according to claim 1, wherein said polyolefin is adsorbed on the pigment surfaces in an oriented manner so that the metal atom R in said polyolefin is more closely adsorbed to the pigment surface than the remaining portion of said polyolefin.
Claim 4
Dependent Claim
21 words
A pigment according to claim 1, wherein said metal atom is selected from the group consisting of Al, Zr and Ti.
Claim 5
Dependent Claim
22 words
A pigment according to claim 1, wherein said polyolefin is a member selected from the group consisting of polyethylenes, polypropylenes and polybutenes.
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) | 1993-04-23 | 1993-10-23 | 1994-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-23 | 1997-10-23 | 1998-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-23 | 2001-10-23 | 2002-04-24 | $7700.00 | Window Closed / Lapsed |