US4871616A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface-treated poly methyl silsequoxane powder
Assignee: Momentive Performance Materials Japan LLC
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Filing: 1987-10-14
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Granted: 1989-10-03
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Expires: 2007-10-14
Abstract
Abstract A surface-treated poly methyl silsesquioxane powder characterized by surface-treatment with an agent comprising a compound which has at least two radicals attached to a metal atom or a silcon atom, said radical is selected from the group consisting of a hydroxyl radical, a hydrolyzable radical and a monovalent hydrocarbon radical substituted by a polar group.
Inventors
- 👤 Hiroshi Kimura
- 👤 Akira Takagi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:45
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/20; C08J3/205; C08J3/2053; C08K; C08K9/00; C08K9/04; C08K9/06; G; G03; G03G; G03G9/00; G03G9/08; G03G9/087; G03G9/08742; G03G9/08773; G03G9/097; G03G9/09733; G03G9/09775; G03G9/09783; C08J2383/00; C08J2383/04; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2998
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
99 words
A surface-treated poly methyl silsesquioxane powder characterized by surface-treatment with an agent comprising a compound which has at least two radicals attached to a metal atom or a silicon atom, said radical is selected from the group consisting of a hydroxyl radical, a hydrolyzable radical and a movement hydrocarbon radical substituted by a polar group, wherein the average particle diameter of said powder is 5μm or smaller, said powder is spherical, and said powder has a particle size distribution that 80% or more of the particles have a diameter within the range of ±30% of the average particle diameter.
Claim 2
Dependent Claim
99 words
A surface-treated poly methyl silsesquioxane powder characterized by surface-treatment with an agent comprising a compound which has at least two radicals attached to a metal atom or a silicon atom, said radical is selected from the group consisting of a hydroxyl radical, a hydrolyzable radical and a movement hydrocarbon radical substituted by a polar group, wherein the average particle diameter of said powder is 5μm or smaller, said powder is spherical, and said powder has a particle size distribution that 80% or more of the particles have a diameter within the range of ±30% of the average particle diameter.
Claim 3
Dependent Claim
22 words
A powder as defined in claim 1, wherein the metal atom contained in the compound that constitutes said surface-treating agent is titanium.
Claim 4
Dependent Claim
19 words
A powder as defined in claim 1, wherein the compound that constitutes said surface-treating agent is a titanium alkoxide.
Claim 5
Dependent Claim
21 words
A powder as defined in claim 1, wherein the metal contained in the compound that constitutes said surface-treating agent is aluminum.
Claim 6
Dependent Claim
18 words
A powder as defined in claim 1, wherein the that constitutes said surface-treating agent is an aluminum alkoxide.
Claim 7
Dependent Claim
22 words
A powder as defined in claim 1, wherein the compound that constitutes said surface-treating agent is an alkoxysilane with an amino radical.
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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) | 1992-10-02 | 1993-04-03 | 1993-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-02 | 1997-04-03 | 1997-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-02 | 2001-04-03 | 2001-10-03 | $7700.00 | Window Closed / Lapsed |