US5282887A
Expired / Lapsed
US
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Conductive coating composition comprising pigment grade carbon
Assignee: Richards William C Co
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Filing: 1992-06-22
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Granted: 1994-02-01
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Expires: 2012-06-22
Abstract
Abstract Conductive coating compositions containing a pigment-grade carbon, a resin and a solvent. The compositions are useful as primers and coatings.
Inventors
- 👤 Arthur S. Gay
- 👤 Salvador R. Lo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:48
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/24; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31511; Y10T428/31515; Y10T428/31551; Y10T428/31725; Y10T428/31786
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
34 words
A conductive coating composition having a resistivity less than 200,000 ohms/square which comprises: a) a pigment-grade carbon; b) a resin; and c) a solvent wherein the pigment-grade carbon is present in a deagglomerated form.
Claim 2
Dependent Claim
34 words
A conductive coating composition having a resistivity less than 200,000 ohms/square which comprises: a) a pigment-grade carbon; b) a resin; and c) a solvent wherein the pigment-grade carbon is present in a deagglomerated form.
Claim 3
Dependent Claim
22 words
The conductive coating composition of claim 1 wherein the pigment-grade carbon has ben ground to a Hegman grind between 7 and 8.0.
Claim 4
Dependent Claim
25 words
The conductive coating composition of claim 2 wherein the resin is selected from the group consisting of polyester, urethane, phenolic, melamine, epoxy, acrylic and alkyd.
Claim 5
Dependent Claim
17 words
The conductive coating composition of claim 3 wherein the solvent is an ether of an alkylene glycol.
Claim 6
Dependent Claim
27 words
An article comprising a substrate having thereon and conductive coating made from the composition of claim 4 having a resistivity between about 10 and about 5000 ohms/square.
Claim 7
Dependent Claim
27 words
An article comprising a substrate having thereon and conductive coating made from the composition of claim 2 having a resistivity between about 10 and about 5000 ohms/square.
Claim 8
Dependent Claim
27 words
An article comprising a substrate having thereon and conductive coating made from the composition of claim 3 having a resistivity between about 10 and about 5000 ohms/square.
Claim 9
Dependent Claim
20 words
The conductive coating composition of claim 1 wherein the resin to pigment ratio is from about 0.35 to about 1.5.
Claim 10
Dependent Claim
23 words
The conductive coating composition of claim 8 wherein the pigment grade carbon has been ground to a Hegman grind between 7.0 and 8.0.
Claim 11
Dependent Claim
27 words
An article comprising a substrate having thereon and conductive coating made from the composition of claim 9 having a resistivity between about 10 and about 5000 ohms/square.
Claim 12
Dependent Claim
27 words
An article comprising a substrate having thereon and conductive coating made from the composition of claim 8 having a resistivity between about 10 and about 5000 ohms/square.
Claim 13
Dependent Claim
27 words
An article comprising a substrate having thereon and conductive coating made from the composition of claim 1 having a resistivity between about 10 and about 5000 ohms/square.
References Cited (Backward Citations)
US3658737A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1997-01-31 | 1997-08-02 | 1998-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-01-31 | 2001-08-02 | 2002-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-01-31 | 2005-08-02 | 2006-02-01 | $7700.00 | Window Closed / Lapsed |