Patent US5756007A successfully refreshed from Google Patents.
US5756007A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition for protection of devices
Assignee: Nokia of America Corp
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Filing: 1995-11-16
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Granted: 1998-05-26
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Expires: 2015-11-16
Abstract
Abstract The present invention is a process for protecting articles from electrostatic discharge (ESD) in which a coating is applied directly onto the article in liquid form and the resulting coating provides a surface resistivity that protects the underlying article from ESD. The composition contains a carrier material, carbon black, and a transition metal. The composition forms a coating on an article when applied as a liquid and dried thereon. The ratio of carrier solids to carbon black is about 100 parts by weight polymer to about 0.5 to about 3 parts by weight carbon black. The ratio of carrier solids to transition metal is about 100 parts by weight about 6 to about 15 parts by weight transition metal.
Inventors
- 👤 John Philip Franey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 11:40
CPC Classifications
H; H10; H10W; H10W42/00; H10W42/60; H10W74/00; H10W74/40; H05; H05F; H05F1/00; H05F1/02; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/923; Y10S428/924; Y10S428/925; Y10S428/926
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
138 words
A composition for protecting articles from electrostatic discharge comprising an emulsion of a carrier material with solids therein, carbon black, and a transition metal that binds to the carbon black in an amount sufficient to protect the article from electrostatic discharge, wherein the composition has a ratio of about 100 parts by weight carrier solids to about 0.5 to about 3 parts by weight carbon black, the ratio of the carrier material to the transition metal is about 100 parts by weight of carrier material to about 6 parts by weight to about 15 parts by weight of the transition metal, and the composition is capable of forming a coating with a thickness of about 0.01 mils to about 1.75 mils and having a resistivity in the range of about 1×10 5 ohms/square to about 1×10 9 ohms/square.
Claim 2
Dependent Claim
138 words
A composition for protecting articles from electrostatic discharge comprising an emulsion of a carrier material with solids therein, carbon black, and a transition metal that binds to the carbon black in an amount sufficient to protect the article from electrostatic discharge, wherein the composition has a ratio of about 100 parts by weight carrier solids to about 0.5 to about 3 parts by weight carbon black, the ratio of the carrier material to the transition metal is about 100 parts by weight of carrier material to about 6 parts by weight to about 15 parts by weight of the transition metal, and the composition is capable of forming a coating with a thickness of about 0.01 mils to about 1.75 mils and having a resistivity in the range of about 1×10 5 ohms/square to about 1×10 9 ohms/square.
Claim 3
Dependent Claim
12 words
The composition of claim 1 wherein the composition further comprises a diluent.
Claim 4
Dependent Claim
19 words
The composition of claim 1 wherein the transition metal is selected from the group consisting of iron and copper.
Claim 5
Dependent Claim
16 words
The composition of claim 3 wherein the carrier material solids are comprised of an acrylic copolymer.
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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) | 2001-05-25 | 2001-11-24 | 2002-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-05-25 | 2005-11-24 | 2006-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-05-25 | 2009-11-24 | 2010-05-26 | $7700.00 | Window Closed / Lapsed |