Patent US4082884A successfully refreshed from Google Patents.
US4082884A
Expired / Lapsed
US
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Method of reducing fouling of marine structures and coated structure thereof
Assignee: United States Trading International Inc
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Filing: 1975-09-19
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Granted: 1978-04-04
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Expires: 1995-09-19
Abstract
Abstract An anti-fouling overcoating composition for watercraft or stationary underwater structures precoated with hard-surface leaching-type anti-fouling paint consists essentially of an aqueous solution or dispersion of a carboxylated hydrophilic acrylic polymer, a cross-linking agent for the carboxylated hydrophilic polymer, polyethylenimine or a hydrophilic polyethylenimine derivative and an effective amount of an ultraviolet-absorbing agent.
Inventors
- 👤 Charles F. De Long
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:10
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/16; C09D5/1693; B; B63; B63B; B63B59/00; B63B59/04; C08; C08K; C08K3/00; C08K3/01; C08K3/011; C08K5/00; C08K5/0008; C08K5/005; C08K5/04; C08K5/10; C08K5/11; C08L; C08L33/00; C08L33/04; C08L33/06; C08L61/00; C08L63/00; C08L71/00; C08L71/02; C09D133/00; C09D133/04; C09D133/06; C09D133/062; C09D133/064; C09D5/1656; C09D5/1662; C09D5/1668; C08L79/00; C08L79/02; C08L79/04; C08L79/08; Y; Y02; Y02T; Y02T70/00; Y02T70/10; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31511; Y10T428/31515; Y10T428/31522; Y10T428/31678; Y10T428/31692; Y10T428/31699; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/31917; Y10T428/31928; Y10T428/31971; Y10T428/31975; Y10T428/31989; Y10T428/8305; Y10T442/00; Y10T442/20; Y10T442/2525; Y10T442/259; Y10T442/2607
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
71 words
A marine structure protected against fouling by marine organisms consisting of a watercraft or stationary marine structure coated below the water line with a hard-surface leaching-type anti-fouling paint and overcoated with an anti-fouling composition consisting essentially of an aqueous solution or dispersion of a carboxylated hydrophilic acrylic polymer, a cross-linking agent for the carboxylated hydrophilic acrylic polymer, polyethylenimine or a hydrophilic polyethylenimine derivative and an effective amount of an ultraviolet-absorbing agent.
Claim 2
Dependent Claim
71 words
A marine structure protected against fouling by marine organisms consisting of a watercraft or stationary marine structure coated below the water line with a hard-surface leaching-type anti-fouling paint and overcoated with an anti-fouling composition consisting essentially of an aqueous solution or dispersion of a carboxylated hydrophilic acrylic polymer, a cross-linking agent for the carboxylated hydrophilic acrylic polymer, polyethylenimine or a hydrophilic polyethylenimine derivative and an effective amount of an ultraviolet-absorbing agent.
Claim 3
Dependent Claim
28 words
The structure of claim 1, wherein the effective amount of the ultraviolet-absorbing agent is from about 0.5 to about 5% by weight of the aqueous solution or dispersion.
Claim 4
Dependent Claim
17 words
The structure of claim 1, wherin the ultraviolet-absorbing agent absorbs from about 2700 to about 3300 A.
Claim 5
Dependent Claim
32 words
The structure of claim 1, wherein said carboxylated hydrophilic acrylic polymer and the polyethylenimine or hydrophilic polyethylenimine derivative constitute from about 5 to about 50% by weight of the solution or dispersion.
Claim 6
Dependent Claim
24 words
The structure of claim 1, wherein the cross-linking agent constitutes from about 0.1 to about 2.5% by weight of the aqueous solution of dispersion.
Claim 7
Dependent Claim
27 words
The structure of claim 1, wherein the ratio of polyethylenimine or hydrophilic polyethylenimine derivative to said carboxylated hydrophilic acrylic polymer is from about 10:1 to about 0.5:1.
Claim 8
Dependent Claim
12 words
The structure of claim 1, wherein the ultraviolet-absorbing agent is 2-ethoxyethyl p-methoxycinnamate.
Claim 9
Independent Claim
72 words
A method of reducing the fouling tendency of watercraft and stationary underwater structures consisting of applying below the water line of the watercraft or underwater structure precoated with hard-surface leaching-type anti-fouling paint an anti-fouling composition consisting essentially of an aqueous solution or dispersion of a carboxylated hydrophilic acrylic polymer, a cross-linking agent for the carboxylated hydrophilic acrylic polymer, polyethylenimine or a hydrophilic polyethylenimine derivative and an effective amount of an ultraviolet-absorbing agent.
Claim 10
Independent Claim
72 words
A method of reducing the fouling tendency of watercraft and stationary underwater structures consisting of applying below the water line of the watercraft or underwater structure precoated with hard-surface leaching-type anti-fouling paint an anti-fouling composition consisting essentially of an aqueous solution or dispersion of a carboxylated hydrophilic acrylic polymer, a cross-linking agent for the carboxylated hydrophilic acrylic polymer, polyethylenimine or a hydrophilic polyethylenimine derivative and an effective amount of an ultraviolet-absorbing agent.
Claim 11
Dependent Claim
22 words
The method of claim 8, wherein said watercraft or underwater structure is pre-wetted with water prior to application of the anti-fouling composition.
Claim 12
Dependent Claim
28 words
The method of claim 8, wherein the effective amount of the ultraviolet-absorbing agent is from about 0.5 to about 5% by weight of the aqueous solution or dispersion.
Claim 13
Dependent Claim
17 words
The method of claim 8, wherein the ultraviolet-absorbing agent absorbs from about 2700 to about 3300 A.
Claim 14
Dependent Claim
32 words
The method of claim 8, wherein the carboxylated hydrophilic acrylic polymer and the polyethylenimine or hydrophilic polyethylenimine derivative constitute from about 5 to about 50% by weight of the solution or dispersion.
Claim 15
Dependent Claim
24 words
The method of claim 8, wherein the cross-linking agent constitutes from about 0.1 to about 2.5% by weight of the aqueous solution or dispersion.
Claim 16
Dependent Claim
27 words
The method of claim 8, wherein the ratio of polyethylenimine or hydrophilic polyethylenimine derivative to said carboxylated hydrophilic acrylic polymer is from about 10:1 to about 0.1:1.
Claim 17
Dependent Claim
12 words
The method of claim 8, wherein the ultraviolet-absorbing agent is 2-ethoxyethyl p-methoxycinnamate.
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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) | 1981-04-03 | 1981-10-03 | 1982-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-03 | 1985-10-03 | 1986-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-03 | 1989-10-03 | 1990-04-04 | $7700.00 | Window Closed / Lapsed |