Patent US4196064A successfully refreshed from Google Patents.
US4196064A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Marine fouling control
Assignee: ConocoPhillips Co
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Filing: 1978-11-06
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Granted: 1980-04-01
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Expires: 1998-11-06
Abstract
Abstract A structure exposed to a marine environment is coated with a coating comprising stainless steel particles such as stainless steel flakes in a coating matrix. Marine growth is removed from the coating by impressing an electrical potential. Marine growth is also prevented. Preferably, the structure is coated with a first coating comprising metallic zinc prior to coating with a second coating comprising stainless steel flakes in an inorganic polymer matrix, and a cathodic potential is impressed.
Inventors
- 👤 Robert L. Harms
- 👤 Merle Hutchison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:08
CPC Classifications
C; C23; C23F; C23F13/00; C23F13/02; C09; C09D; C09D5/00; C09D5/16
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
65 words
In combination with a structure exposed to marine fouling, the improvement comprising: (a) an electrically conductive coating adhered to the structure in zones exposed to the fouling comprised of particles of a stainless steel alloy containing chromium within a coating matrix; (b) an electrical potential generator in electrical contact with the coating sufficient to impart potential thereto sufficient to inhibit or to detach marine growth.
Claim 2
Dependent Claim
65 words
In combination with a structure exposed to marine fouling, the improvement comprising: (a) an electrically conductive coating adhered to the structure in zones exposed to the fouling comprised of particles of a stainless steel alloy containing chromium within a coating matrix; (b) an electrical potential generator in electrical contact with the coating sufficient to impart potential thereto sufficient to inhibit or to detach marine growth.
Claim 3
Dependent Claim
23 words
The improvement of claim 1 wherein the coating is underlain by a coating comprising a metal or alloy containing metallic zinc or cadmium.
Claim 4
Dependent Claim
26 words
The improvement of claim 1 wherein the coating is adhered to a coating comprising zinc in a matrix comprising silicates which is adhered to the structure.
Claim 5
Dependent Claim
23 words
The improvement of claim 3 wherein the coating comprised of flakes of stainless steel within a coating matrix comprises a matrix of silicates.
Claim 6
Independent Claim
57 words
A method for preventing fouling of structures exposed to marine growth comprising: (a) coating the structure exposed to the fouling with an electrically conductive coating comprised of particles of a stainless steel alloy containing chromium within a coating matrix; (b) periodically imparting an electrical potential to the coating sufficient to detach or inhibit growth of marine organisms.
Claim 7
Independent Claim
57 words
A method for preventing fouling of structures exposed to marine growth comprising: (a) coating the structure exposed to the fouling with an electrically conductive coating comprised of particles of a stainless steel alloy containing chromium within a coating matrix; (b) periodically imparting an electrical potential to the coating sufficient to detach or inhibit growth of marine organisms.
Claim 8
Dependent Claim
37 words
The process of claim 5 wherein the coating comprises flakes of stainless steel within a matrix comprised of silicates and wherein the electrical potential is a cathodic potential and is sufficient to detach marine organisms growing thereon.
Claim 9
Dependent Claim
37 words
The process of claim 6 wherein a coating comprising a metal or alloy containing zinc or cadmium is adhered to the structure prior to adherence of the coating comprising the stainless steel flakes in the silicate matrix.
Claim 10
Dependent Claim
29 words
The process of claim 6 wherein a layer of zinc is adhered to the structure prior to adhering the coating comprised of stainless steel flakes in a silicate matrix.
Claim 11
Dependent Claim
12 words
The process of claim 7 wherein the structure is an offshore platform.
Claim 12
Dependent Claim
12 words
The process of claim 7 wherein the structure is a seagoing ship.
Claim 13
Dependent Claim
13 words
The process of claim 7 wherein the structure is fabricated of carbon steel.
Claim 14
Dependent Claim
77 words
The process of claim 5 wherein the coating comprises flakes of stainless steel in a matrix comprising silicates, wherein the coating overlies a coating comprising a metal or alloy containing zinc which is adhered to the structure prior to adherence of the coating containing flakes of stainless steel, and wherein the electrical potential is a cathodic potential such that a current density of 10 milliamperes per square foot to about 2500 milliamperes per square foot is impressed.
Claim 15
Dependent Claim
76 words
The process of claim 5 wherein the coating comprises flakes of stainless steel in a matrix comprising silicates, wherein the coating overlies a coating comprising a metal or alloy containing zinc which is adhered to the structure prior to adherence of the coating containing of stainless steel, and wherein the electrical potential is an anodic potential such that a current density of 10 milliamperes per square foot to about 2500 milliamperes per square foot is impressed.
Claim 16
Dependent Claim
12 words
The process of claim 13 wherein the structure is a seagoing ship.
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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) | 1983-04-01 | 1983-10-01 | 1984-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-01 | 1987-10-01 | 1988-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-01 | 1991-10-01 | 1992-04-01 | $7700.00 | Window Closed / Lapsed |