US4686108A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conductive coatings for wood products
Assignee: Reliance Universal Inc
•
Filing: 1985-07-18
•
Granted: 1987-08-11
•
Expires: 2005-07-18
Abstract
Abstract Disclosed herein is a conductive polymeric coating having a charge density of greater than about two which, after being applied to a nonconductive substrate, allows overcoating of that substrate by electrostatic spraying. Exemplary of the conductive polymeric coatings useful herein are those based upon quaternized homopolymers or copolymers of dimethyldiallylamine.
Inventors
- 👤 Dale L. Nason
- 👤 Richard L. Gray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:32
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/06; B05D7/08; B05D1/00; B05D1/02; B05D1/04; B05D1/045; H; H01; H01B; H01B1/00; H01B1/06; H01B1/12; H01B1/122; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31971; Y10T428/31989
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
48 words
A process for coating a wooden substrate comprising (a) applying to the substrate a nonaqueous, surfactant-free coating of a conductive polymeric material having a charge density of greater than about 2; (b) drying the conductive coating; and (c) applying a topcoat over the conductive coating by electrostatic spraying.
Claim 2
Dependent Claim
48 words
A process for coating a wooden substrate comprising (a) applying to the substrate a nonaqueous, surfactant-free coating of a conductive polymeric material having a charge density of greater than about 2; (b) drying the conductive coating; and (c) applying a topcoat over the conductive coating by electrostatic spraying.
Claim 3
Dependent Claim
19 words
The process of claim 1 wherein the conductive polymeric material has a charge density of greater than about 2.25.
Claim 4
Dependent Claim
19 words
The process of claims 1 or 2 wherein the polymeric material is a homopolymer or copolymer of dialkyldiallylammonium chloride.
Claim 5
Dependent Claim
25 words
The process of claims 1 or 2 wherein the polymeric material is a cellulosic based polymer having amine nitrogen atoms present in the polymer backbone.
Claim 6
Dependent Claim
17 words
The process of claim 3 wherein the copolymer contains at least about 30% of a dialkyldiallylammonium chloride.
Claim 7
Dependent Claim
73 words
A process for coating a nonconductive wood substrate which comprises: (a) apply to the substrate a coating of a nonaqueous, surfactant-free solvent solution or dispersion of a conductive polymeric material having a charge density of at least about 2.25; (b) removing substantially all of the solvent from the conductive coating; and (c) applying a topcoat over the coating by electrostatic spraying wherein the polymeric material is a homopolymer or copolymer of dialkyldiallyammonium chloride.
Claim 8
Dependent Claim
73 words
A process for coating a nonconductive wood substrate which comprises: (a) apply to the substrate a coating of a nonaqueous, surfactant-free solvent solution or dispersion of a conductive polymeric material having a charge density of at least about 2.25; (b) removing substantially all of the solvent from the conductive coating; and (c) applying a topcoat over the coating by electrostatic spraying wherein the polymeric material is a homopolymer or copolymer of dialkyldiallyammonium chloride.
Claim 9
Dependent Claim
17 words
The process of claim 6 wherein the copolymer contains at least about 30% of a dialkyldiallylammonium chloride.
Claim 10
Dependent Claim
34 words
The process of claims 1 2, 6 or 7 wherein the conductive polymer is a quaternized polymer wherein the quaternization agent is selected from the organic and inorganic acids and alkyl sulfates and chlorides.
Claim 11
Dependent Claim
12 words
The process of claim 8 wherein the quaternization agent is hydrochloric acid.
References Cited (Backward Citations)
US3887496A
Cited
US4013804A
Cited
US4011176A
Cited
US4132674A
Cited
US4222901A
Cited
US4294739A
Cited
US4454058A
Cited
US4530778A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-08-10 | 1991-02-09 | 1991-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-10 | 1995-02-09 | 1995-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-10 | 1999-02-09 | 1999-08-11 | $7700.00 | Window Closed / Lapsed |