Patent US4447564A successfully refreshed from Google Patents.
US4447564A
Expired / Lapsed
US
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Reactive resin compositions and molded substances made therefrom
Assignee: Siemens AG
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Filing: 1982-09-28
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Granted: 1984-05-08
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Expires: 2002-09-28
Abstract
Abstract The compositions are anhydride-hardened epoxy resins which are filled with calcium-magnesium or calcium carbonate particles having a coating of a multibasic organic or inorganic acid bonded to the surfaces of the particles. Castings or moldings made therefrom, particularly electrical parts for SF6 technology, exhibit improved mechanical properties such as bending strength and impact strength.
Inventors
- 👤 Rudolf Grimmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:06
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/02; H01H33/021; C; C08; C08K; C08K9/00; C08K9/02; C08K9/04; C09; C09C; C09C1/00; C09C1/02; C09C1/021; C09C1/022; C09C1/024; C09C1/028; C09C3/00; C09C3/06; C09C3/08; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/40; C01; C01P; C01P2004/00; C01P2004/80; C01P2004/82; C01P2004/84
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
36 words
A filled resin composition comprising an epoxy resin hardened with an anhydride hardener and interbonded with carbonate salt filler particles having a coating of a multibasic organic or inorganic acid bonded to the filler particle surfaces.
Claim 2
Dependent Claim
36 words
A filled resin composition comprising an epoxy resin hardened with an anhydride hardener and interbonded with carbonate salt filler particles having a coating of a multibasic organic or inorganic acid bonded to the filler particle surfaces.
Claim 3
Dependent Claim
12 words
A composition according to claim 1, wherein dolomite is the carbonate filler.
Claim 4
Dependent Claim
13 words
A composition according to claim 1, wherein a calcite is the carbonate filler.
Claim 5
Dependent Claim
17 words
A composition according to claim 1, wherein the carbonate filler particle coating is a multibasic inorganic acid.
Claim 6
Dependent Claim
17 words
A composition according to claim 1, wherein the carbonate filler particle coating is a multibasic organic acid.
Claim 7
Dependent Claim
18 words
A composition according to claim 1, wherein the carbonate filler particle coating is succinic acid or fumaric acid.
Claim 8
Dependent Claim
17 words
A composition according to claim 1, wherein the carbonate filler particle coating is an organic hydroxy acid.
Claim 9
Dependent Claim
18 words
A composition according to claim 1, wherein the carbonate filler particle coating is citric acid or malic acid.
Claim 10
Dependent Claim
16 words
A composition according to claim 1, wherein the carbonate filler particle coating is multibasic amino acid.
Claim 11
Dependent Claim
13 words
A molding made of a filled, hardened resin composition according to claim 1.
References Cited (Backward Citations)
CA666517A
Cited
US2841504A
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GB1009198A
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US3314912A
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US3468839A
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Cited
JPS5688449A
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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) | 1987-05-08 | 1987-11-07 | 1988-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-08 | 1991-11-07 | 1992-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-08 | 1995-11-07 | 1996-05-08 | $7700.00 | Window Closed / Lapsed |