US3620943A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Black antifouling coating compositions
Assignee: Celanese Coatings Co
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Filing: 1969-05-26
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Granted: 1971-11-16
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Expires: 1989-05-26
Abstract
Abstract A method for preventing the growth of white calcareous deposits on black antifouling coated surfaces of marine vessels which are protected from corrosion by sacrificial metal anodes by applying to the surface a coating containing black iron oxide and copper compounds.
Inventors
- 👤 John D White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:33
CPC Classifications
B; B63; B63B; B63B59/00; B63B59/04; C; C09; C09D; C09D5/00; C09D5/16; C09D5/1606; C09D5/1612; C09D5/1618; C23; C23F; C23F13/00; C23F13/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
12 words
The vessel of claim 1 wherein the antifouling ingredient is cuprous oxide.
Claim 2
Dependent Claim
41 words
The vessel of claim 1 wherein the paint contains about 50 to about 75 weight percent copper pigment and about 10 to about 25 weight percent black iron oxide, said weight percents being based on the total weight of dry coating.
Claim 3
Dependent Claim
12 words
The vessel of claim 1 wherein the sacrificial metal anode is zinc.
Claim 4
Dependent Claim
60 words
A process for preventing the formation of white calcareous deposits on black camouflaged painted exterior surfaces of submarines, said surfaces being protected from corrosion by sacrificial metal anodes which comprises applying to the exterior surface a black antifouling paint which contains only black iron oxide as the black pigment and copper, copper compounds or mixtures thereof as the antifouling ingredient.
Claim 5
Dependent Claim
12 words
The process of claim 5 wherein the antifouling ingredient is cuprous oxide.
Claim 6
Dependent Claim
41 words
The process of claim 5 wherein the paint contains about 50 to about 75 weight percent copper pigment and about 10 to about 25 weight percent black iron oxide, said weight percents being based on the total weight of dry coating.
Claim 7
Dependent Claim
12 words
The process of claim 5 wherein the sacrificial metal anode is zinc.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-15 | 1975-05-17 | 1975-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-15 | 1979-05-17 | 1979-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-15 | 1983-05-17 | 1983-11-16 | $7700.00 | Window Closed / Lapsed |