US5696196A
Expired / Lapsed
US
⏱️ 0.0 years remaining
EMI/RFI-shielding coating
Assignee: Egyptian Lacquer Manuf Co
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Filing: 1995-09-15
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Granted: 1997-12-09
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Expires: 2015-09-15
Abstract
Abstract A coating composition for shielding plastic against electromagnetic interference (EMI) and radio frequency interference (RFI). The composition includes an aqueous dispersion thermoplastic emulsion, an aqueous urethane dispersion, a glycol-based coalescing solvent, silver-plated copper flakes, conductive clay and one or more defoamers.
Inventors
- 👤 Derek A. DiLeo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:59
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/24
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
88 words
A conductive coating, comprising: a) between about 7.0% and about 65.0% by weight of a thermoplastic aqueous dispersion; b) between about 1.5% and about 10.0% by weight of an aqueous urethane dispersion; c) between about 2.5% and about 16.0% by weight of a glycol coalescing solvent; d) between about 0.1% and about 5.0% by weight of a conductive clay; e) particles of a conductive metal selected from the group consisting of copper, silver, nickel and gold, and mixtures thereof; f) one or more defoaming agents; and g) water.
Claim 2
Dependent Claim
88 words
A conductive coating, comprising: a) between about 7.0% and about 65.0% by weight of a thermoplastic aqueous dispersion; b) between about 1.5% and about 10.0% by weight of an aqueous urethane dispersion; c) between about 2.5% and about 16.0% by weight of a glycol coalescing solvent; d) between about 0.1% and about 5.0% by weight of a conductive clay; e) particles of a conductive metal selected from the group consisting of copper, silver, nickel and gold, and mixtures thereof; f) one or more defoaming agents; and g) water.
Claim 3
Dependent Claim
15 words
The composition of claim 1 wherein said aqueous dispersion thermoplastic emulsion is an acrylic emulsion.
Claim 4
Dependent Claim
14 words
The composition of claim 2 wherein said acrylic emulsion is a modified acrylic emulsion.
Claim 5
Dependent Claim
14 words
The composition of claim 3 wherein said acrylic emulsion is a styrenated acrylic emulsion.
Claim 6
Dependent Claim
27 words
The composition of claim 1 wherein said aqueous dispersion urethane dispersion includes a member selected from the group consisting of polyurethane, polyester, acrylic resin and vinyl resin.
Claim 7
Dependent Claim
16 words
The composition of claim 1 wherein said particles of conductive metal are particles of silver-plated copper.
Claim 8
Dependent Claim
22 words
The composition of claim 6 wherein said particles of silver-plated copper are provided as flakes of from 5 microns to 75 microns.
Claim 9
Dependent Claim
22 words
The composition of claim 7 wherein said particles of silver-plated copper are provided as flakes of from 25 microns to 60 microns.
Claim 10
Dependent Claim
20 words
The composition of claim 1 wherein between about 0.02% and about 2.0% (by weight) defoamer is included in the composition.
Claim 11
Dependent Claim
18 words
The composition of claim 1 wherein the composition has a pH of between about 7.0 to about 9.0.
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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) | 2000-12-08 | 2001-06-09 | 2001-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-12-08 | 2005-06-09 | 2005-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-12-08 | 2009-06-09 | 2009-12-09 | $7700.00 | Window Closed / Lapsed |