US5008146A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Zinc-carbon antifouling coating
Assignee: Cape Cod Research Inc
•
Filing: 1989-10-10
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Granted: 1991-04-16
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Expires: 2009-10-10
Abstract
Abstract An antifouling coating comprising no toxicant. The formulation contains in combination zinc and carbon which in the presence of the aqueous environment render the coating resistant to fouling.
Inventors
- 👤 Francis L. Keohan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:27
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/16; Y; Y10; Y10S; Y10S428/00; Y10S428/907; Y10T; Y10T428/00; Y10T428/25; Y10T428/256
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
37 words
A method for rendering underwater structures resistant to fouling by pestiferous organisms which comprises contacting said structures with a composition comprising 10 to 60 percent by weight metallic zinc in combination with 5 to 40 percent carbon.
Claim 2
Independent Claim
37 words
A method for rendering underwater structures resistant to fouling by pestiferous organisms which comprises contacting said structures with a composition comprising 10 to 60 percent by weight metallic zinc in combination with 5 to 40 percent carbon.
Claim 3
Dependent Claim
21 words
A method according to claim 1 wherein said metallic zinc is powder with a mean particle size greater than 3 microns.
Claim 4
Dependent Claim
28 words
A method according to claim 1, wherein said metallic zinc contains by weight percent no more than 0.006 lead, 0.0014 iron, 0.06 cadmium, 0.005 copper and 0.3 aluminum.
Claim 5
Dependent Claim
24 words
A method according to claim 1, wherein said carbon is selected from the group consisting of graphite, carbon black, activated charcoal and acetylene black.
Claim 6
Dependent Claim
16 words
A ship's hull provided with an antifouling coating according to the method recited in claim 1.
References Cited (Backward Citations)
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US4020200A
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US4273833A
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US4482652A
Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-04-15 | 1994-10-15 | 1995-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-04-15 | 1998-10-15 | 1999-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-04-15 | 2002-10-15 | 2003-04-16 | $7700.00 | Window Closed / Lapsed |