Patent US4680139A successfully refreshed from Google Patents.
US4680139A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatically conductive premold coating
Assignee: Vibrantz Corp
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Filing: 1985-05-02
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Granted: 1987-07-14
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Expires: 2005-05-02
Abstract
Abstract Resin is mixed with graphite particles to form a blendable, processable premold coating. When the premold coating is incorporated onto the surface of a premold coated molded plastic product produced by the premold process, said coating is rendered electrostatically conductive.
Inventors
- 👤 Charles F. Williams
- 👤 Atam P. Sahni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:22
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/20; H01B1/24; B; B29; B29C; B29C37/00; B29C37/0025; B29C37/0028; B29C37/0032; B29C70/00; B29C70/88; B29C70/887; C; C08; C08K; C08K3/00; C08K3/02; C08K3/04; B29C2037/0039; B29K; B29K2707/00; B29K2707/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
92 words
A powdered electroconductive coating composition having a particle size of at least 100 mesh adaptable to be applied and cured to a final, finish coating over a compatible synthetic resinous substrate and chemically bonded thereto, the powdered composition comprising a partially cured, thermosetting synthetic resin having graphite dispersed throughout each particle, wherein the graphite is in the form of flake having a particle size of about 5 to 80 microns, or a mixture of said graphite flake and graphite fiber and is present in sufficient quantity to render said cured coating electroconductive.
Claim 2
Dependent Claim
92 words
A powdered electroconductive coating composition having a particle size of at least 100 mesh adaptable to be applied and cured to a final, finish coating over a compatible synthetic resinous substrate and chemically bonded thereto, the powdered composition comprising a partially cured, thermosetting synthetic resin having graphite dispersed throughout each particle, wherein the graphite is in the form of flake having a particle size of about 5 to 80 microns, or a mixture of said graphite flake and graphite fiber and is present in sufficient quantity to render said cured coating electroconductive.
Claim 3
Dependent Claim
18 words
The coating composition of claim 1, adaptable to be applied to said resinous substrate by the premold process.
Claim 4
Dependent Claim
16 words
The coating composition of claim 1, wherein said graphite is present in about 23 weight percent.
Claim 5
Dependent Claim
84 words
A powdered electroconductive coating composition having a particle size of at least 100 mesh and being curable to provide a cured electrostatically conductive coating on a premold plastic part, the powdered coating composition comprising a partially cured, thermosetting synthetic resin having dispersed in each resin particle an effective electroconductive-providing amount of graphite flake having a particle size of about 5 to 80 microns or a mixture of said graphite flake and graphite fiber in which the fiber has a length of about 300 microns.
Claim 6
Dependent Claim
84 words
A powdered electroconductive coating composition having a particle size of at least 100 mesh and being curable to provide a cured electrostatically conductive coating on a premold plastic part, the powdered coating composition comprising a partially cured, thermosetting synthetic resin having dispersed in each resin particle an effective electroconductive-providing amount of graphite flake having a particle size of about 5 to 80 microns or a mixture of said graphite flake and graphite fiber in which the fiber has a length of about 300 microns.
Claim 7
Dependent Claim
16 words
A composition as defined in claim 4 in which the synthetic resin is an unsaturated polyester.
Claim 8
Dependent Claim
42 words
A composition as defined in claim 4 in which the synthetic resin is a partially cured unsaturated polyester and the composition includes a crosslinking agent and a polymerization catalyst for further curing the polyester resin to provide a cured electrostatically conductive coating.
Claim 9
Dependent Claim
24 words
A composition as defined in claim 6 in which the crosslinking agent is a diallyl phthalate prepolymer and the catalyst is tertiary butyl perbenzoate.
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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) | 1990-07-13 | 1991-01-12 | 1991-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-13 | 1995-01-12 | 1995-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-13 | 1999-01-12 | 1999-07-14 | $7700.00 | Window Closed / Lapsed |