US4082588A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal protecting lead/plastic laminate
Assignee: Department of National Defence
•
Filing: 1977-01-19
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Granted: 1978-04-04
•
Expires: 1997-01-19
Abstract
Abstract A method of protecting surfaces against deterioration by environmental factors is described. In a particular aspect of this invention a metal surface subject to electrochemical corrosion has applied to it a metal-plastic laminate comprising (a) a foil of corrosion-resistant metal, in particular lead; (b) a plastic film ranging up to about 20 mils in thickness, bonded to one surface of the metal foil, either by "extrusion coating" or by means of a suitable adhesive; and (c) a coating of pressure-sensitive adhesive on the opposite surface of the metal foil. (In some cases the outer plastic film can be omitted.) The laminate is bonded to the metal substrate by means of the pressure-sensitive adhesive. This method, when used in conjunction with a coating of anti-fouling paint, is effective for protecting the hull of a marine vessel both against corrosion and fouling by marine organisms such as barnacles; and the invention is also effective in protecting wooden vessels against marine borers. The method is relatively inexpensive and easy to carry out, and requires only a minimum of surface preparation of the substrate.
Inventors
- 👤 William Arthur Anderton
- 👤 Richard Benjamin Hollis Sewell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:39
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/04; B32B15/08; B29; B29C; B29C63/00; B32B27/00; B32B27/30; B32B27/304; B32B37/00; B32B37/12; B63; B63B; B63B59/00; B63B59/04; E; E04; E04B; E04B1/00; E04B1/62; E04B1/64; E04B1/642; B32B2307/00; B32B2307/70; B32B2307/714; B32B2309/00; B32B2309/08; B32B2309/10; B32B2309/105; B32B2311/00; B32B2311/14; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31692
Claims Analysis
Total Claims: 36
Claim 1
Independent Claim
104 words
A method for protection against electrochemical corrosion of a metal substrate which is subject to said corrosion, said method comprising applying to said substrate a metal-plastic laminate comprising (a) a foil of corrosion-resistant lead, said foil having a thickness from about 1 to about 25 mils; (b) a plastic film of thickness ranging from 0 to about 20 mils, one surface of which is bonded to one surface of said metal foil; and (c) a coating of pressure-sensitive adhesive on the opposite surface of said lead foil; whereby said laminate is bonded to the surface of said substrate by means of said pressure-sensitive adhesive.
Claim 2
Independent Claim
104 words
A method for protection against electrochemical corrosion of a metal substrate which is subject to said corrosion, said method comprising applying to said substrate a metal-plastic laminate comprising (a) a foil of corrosion-resistant lead, said foil having a thickness from about 1 to about 25 mils; (b) a plastic film of thickness ranging from 0 to about 20 mils, one surface of which is bonded to one surface of said metal foil; and (c) a coating of pressure-sensitive adhesive on the opposite surface of said lead foil; whereby said laminate is bonded to the surface of said substrate by means of said pressure-sensitive adhesive.
Claim 3
Dependent Claim
14 words
A method as in claim 1 wherein the metal substrate is iron or steel.
Claim 4
Independent Claim
123 words
A method which comprises applying to the hull of a marine vessel a metal-plastic laminate comprising (a) a foil of corrosion-resistant lead, said foil having a thickness from about 1 to about 20 mils; (b) a plastic film of thickness ranging from 0 to about 20 mils, one surface of which is bonded to one surface of said metal foil; and (c) a coating of pressure-sensitive adhesive on the opposite surface of said foil, the laminate being bonded to said hull by means of said pressure-sensitive adhesive; and (d) applied to the outer surface of said plastic film, a protective coating layer having anti-fouling properties; whereby the hull of said vessel is protected both against electrochemical corrosion and against fouling by marine organisms.
Claim 5
Independent Claim
123 words
A method which comprises applying to the hull of a marine vessel a metal-plastic laminate comprising (a) a foil of corrosion-resistant lead, said foil having a thickness from about 1 to about 20 mils; (b) a plastic film of thickness ranging from 0 to about 20 mils, one surface of which is bonded to one surface of said metal foil; and (c) a coating of pressure-sensitive adhesive on the opposite surface of said foil, the laminate being bonded to said hull by means of said pressure-sensitive adhesive; and (d) applied to the outer surface of said plastic film, a protective coating layer having anti-fouling properties; whereby the hull of said vessel is protected both against electrochemical corrosion and against fouling by marine organisms.
Claim 6
Dependent Claim
18 words
A method as in claim 1 wherein the laminate is applied by rolling it onto said metal substrate.
Claim 7
Independent Claim
97 words
A method of protecting a steel marine vessel against electrochemical corrosion, which comprises applying to the hull of said vessel a metal-plastic laminate comprising (a) a foil of corrosion-resistant lead, said foil having a thickness from about 1 to about 25 mils; (b) a plastic film of thickness ranging from 0 to about 20 mils, one surface of which is bonded to one surface of said metal foil; and (c) a coating of pressure-sensitive adhesive on the opposite surface of said lead foil; whereby said laminate is bonded to said hull by means of said pressure-sensitive adhesive.
Claim 8
Independent Claim
97 words
A method of protecting a steel marine vessel against electrochemical corrosion, which comprises applying to the hull of said vessel a metal-plastic laminate comprising (a) a foil of corrosion-resistant lead, said foil having a thickness from about 1 to about 25 mils; (b) a plastic film of thickness ranging from 0 to about 20 mils, one surface of which is bonded to one surface of said metal foil; and (c) a coating of pressure-sensitive adhesive on the opposite surface of said lead foil; whereby said laminate is bonded to said hull by means of said pressure-sensitive adhesive.
Claim 9
Independent Claim
117 words
A method of protecting a wooden marine vessel against marine borers and fouling organisms which comprises applying to the hull of said vessel a metal-plastic laminate comprising (a) a foil of corrosion-resistant lead, said foil having a thickness from about 1 to about 25 mils; (b) a plastic film of thickness ranging from 0 to about 20 mils, one surface of which is bonded to one surface of said metal foil; (c) a coating of pressure-sensitive adhesive on the opposite surface of said metal foil; and (d) a protective coating layer having anti-fouling properties applied to the outer surface of said plastic film; whereby said laminate is bonded to said hull by means of said pressure-sensitive adhesive.
Claim 10
Independent Claim
117 words
A method of protecting a wooden marine vessel against marine borers and fouling organisms which comprises applying to the hull of said vessel a metal-plastic laminate comprising (a) a foil of corrosion-resistant lead, said foil having a thickness from about 1 to about 25 mils; (b) a plastic film of thickness ranging from 0 to about 20 mils, one surface of which is bonded to one surface of said metal foil; (c) a coating of pressure-sensitive adhesive on the opposite surface of said metal foil; and (d) a protective coating layer having anti-fouling properties applied to the outer surface of said plastic film; whereby said laminate is bonded to said hull by means of said pressure-sensitive adhesive.
Claim 11
Dependent Claim
25 words
A method as set forth in claim 1 wherein the plastic film is bonded to said one surface of the lead foil by extrusion lamination.
Claim 12
Dependent Claim
25 words
A method as set forth in claim 6 wherein the plastic film is bonded to said one surface of the lead foil by extrusion lamination.
Claim 13
Dependent Claim
25 words
A method as set forth in claim 3 wherein the plastic film is bonded to said one surface of the metal foil by extrusion lamination.
Claim 14
Dependent Claim
21 words
A method as in claim 1 wherein the plastic film is adhesively secured to said one surface of the metal foil.
Claim 15
Dependent Claim
21 words
A method as in claim 6 wherein the plastic film is adhesively secured to said one surface of the lead foil.
Claim 16
Dependent Claim
21 words
A method as in claim 3 wherein the plastic film is adhesively secured to said one surface of the lead foil.
Claim 17
Dependent Claim
17 words
A method as in claim 5 wherein the laminate is applied by rolling it onto said hull.
Claim 18
Dependent Claim
17 words
A method as in claim 6 wherein the laminate is applied by rolling it onto said hull.
Claim 19
Dependent Claim
23 words
A method as in claim 5 wherein the plastic film is bonded to said one surface of the lead foil by extrusion lamination.
Claim 20
Dependent Claim
18 words
A method as set forth in claim 1 wherein the lead foil has a thickness of 5-6 mils.
Claim 21
Dependent Claim
18 words
A method as set forth in claim 6 wherein the lead foil has a thickness of 5-6 mils.
Claim 22
Dependent Claim
16 words
A method as defined in claim 1 wherein the plastic film is omitted from the laminate.
Claim 23
Dependent Claim
16 words
A method as defined in claim 6 wherein the plastic film is omitted from the laminate.
Claim 24
Dependent Claim
13 words
A method as defined in claim 1 wherein the plastic film is saran.
Claim 25
Dependent Claim
13 words
A method as defined in claim 6 wherein the plastic film is saran.
Claim 26
Dependent Claim
15 words
A method as defined in claim 1 wherein the pressure-sensitive adhesive is a polyvinyl ether.
Claim 27
Dependent Claim
15 words
A method as defined in claim 6 wherein the pressure-sensitive adhesive is a polyvinyl ether.
Claim 28
Dependent Claim
25 words
A method as defined in claim 1 wherein saran film is secured to one surface of said lead foil by means of polyvinyl butyral adhesive.
Claim 29
Dependent Claim
25 words
A method as defined in claim 6 wherein saran film is secured to one surface of a lead foil by means of polyvinyl butyral adhesive.
Claim 30
Dependent Claim
25 words
A method as defined in claim 5 wherein saran film is secured to one surface of said lead foil by means of polyvinyl butyral adhesive.
Claim 31
Dependent Claim
17 words
A method as in claim 6 wherein the laminate is applied by rolling it onto said surface.
Claim 32
Dependent Claim
31 words
A method as set forth in claim 1 wherein the substrate to be protected is a generally cylindrical metal body, and the lead-plastic laminate is applied thereto in a spiral pattern.
Claim 33
Dependent Claim
31 words
A method as set forth in claim 6 wherein the substrate to be protected is a generally cylindrical metal body, and the metal-plastic laminate is applied thereto in a spiral pattern.
Claim 34
Dependent Claim
21 words
A method as in claim 5 wherein the plastic film is adhesively secured to said one surface of the lead foil.
Claim 35
Dependent Claim
16 words
A method as defined in claim 5 wherein the plastic film is omitted from the laminate.
Claim 36
Dependent Claim
13 words
A method as defined in claim 5 wherein the plastic film is saran.
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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 |