Patent US4947785A successfully refreshed from Google Patents.
US4947785A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvements in or relating to boat hulls
Assignee: International Paint Ltd
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Filing: 1988-12-28
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Granted: 1990-08-14
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Expires: 2008-12-28
Abstract
Abstract A boat hull or part thereof produced by applying layers of curable resin to a mould or former and curing the resin in the mould or on the former. A layer of a non-biocidal antifouling material is applied to the mould, or to the outermost layer of resin if using a former, so that the non-biocidal antifouling material forms the outermost layer of the boat hull. A non-biocidal antifouling material used as the outermost underwater surface of a boat hull has fine grooves extending in the longitudinal direction of the hull. The grooves can be formed by applying the non-biocidal antifouling material to a grooved mould when using the process described above. Alternatively the underwater surface of a boat hull can be clad with a grooved non-biocidal antifouling material.
Inventors
- 👤 Alexander Milne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:08
CPC Classifications
B; B63; B63B; B63B59/00; B63B59/04; B63B5/00; B63B5/24; C; C09; C09D; C09D5/00; C09D5/16; C09D5/1693; Y; Y10; Y10S; Y10S428/00; Y10S428/907
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
75 words
A process for the production of a boat hull or part thereof, comprising applying a continuous layer 5 to 500 microns thick of a non-biocidal antifouling material which does not release a poison for marine organisms but which resists the adhesion of marine fouling organisms to a mould so that it forms a continuous outermost layer of the boat hull, applying layers of curable resin to the mould and curing the resin in the mould.
Claim 2
Dependent Claim
75 words
A process for the production of a boat hull or part thereof, comprising applying a continuous layer 5 to 500 microns thick of a non-biocidal antifouling material which does not release a poison for marine organisms but which resists the adhesion of marine fouling organisms to a mould so that it forms a continuous outermost layer of the boat hull, applying layers of curable resin to the mould and curing the resin in the mould.
Claim 3
Dependent Claim
17 words
A process according to claim 1, in which the non-biocidal antifouling material is a room-temperature-vulcanisable silicone rubber.
Claim 4
Dependent Claim
30 words
A process according to claim 2, in which the layer of room-temperature-vulcanisable silicone rubber contains a non-reactive fluid selected from the group consisting of non-reactive polyorganosiloxanes and non-reactive hydrocarbon compounds.
Claim 5
Dependent Claim
34 words
A process according to claim 2, in which the layer of resin immediately adjacent to the layer of room-temperature-vulcanisable silicone rubber is a tie coat comprising a silicone resin and an aminosilane adhesion promoter.
Claim 6
Dependent Claim
43 words
A process according to claim 1, in which the layers of curable resin include at least one layer containing fibrous reinforcement, and the layer of resin immediately adjacent to the non-biocidal antifouling material is a layer of curable resin containing no fibrous reinforcement.
Claim 7
Dependent Claim
29 words
A process according to claim 1, in which the non-biocidal antifouling layer is applied to the mould in the form of a fabric coated with a room-temperature-vulcanisable silicone rubber.
Claim 8
Dependent Claim
36 words
A process according to claim 1, in which the mould surface is finely grooved in the longitudinal direction of the boat hull so that the non-biocidal antifouling surface of the boat hull is also finely grooved.
Claim 9
Dependent Claim
94 words
A process for the production of a boat hull or part thereof, comprising applying layers of curable resin to a former and curing the resin on the former, in which process a continuous layer 5 to 500 microns thick of a non-biocidal antifouling material which does not release a poison for marine organisms but which resists adhesion of marine fouling organisms is applied to the outermost layer of resin on the former before the resin has been fully cured so that the non-biocidal antifouling material forms a continuous outermost layer of the boat hull.
Claim 10
Dependent Claim
94 words
A process for the production of a boat hull or part thereof, comprising applying layers of curable resin to a former and curing the resin on the former, in which process a continuous layer 5 to 500 microns thick of a non-biocidal antifouling material which does not release a poison for marine organisms but which resists adhesion of marine fouling organisms is applied to the outermost layer of resin on the former before the resin has been fully cured so that the non-biocidal antifouling material forms a continuous outermost layer of the boat hull.
Claim 11
Dependent Claim
17 words
A process according to claim 8, in which the non-biocidal antifouling material is a room-temperature-vulcanisable silicone rubber.
Claim 12
Dependent Claim
26 words
A process according to claim 9, in which the layer of room-temperature-vulcanisable silicone rubber contains a non-reactive fluid selected from non-reactive polyorganosiloxanes and non-reactive hydrocarbon compounds.
Claim 13
Dependent Claim
34 words
A process according to claim 9, in which the layer of resin immediately adjacent to the layer of room-temperature-vulcanisable silicone rubber is a tie coat comprising a silicone resin and an aminosilane adhesion promoter.
Claim 14
Dependent Claim
43 words
A process according to claim 8, in which the layers of curable resin include at least one layer containing fibrous reinforcement and the layer of resin immediately adjacent to the non-biocidal antifouling material is a layer of curable resin containing no fibrous reinforcement.
Claim 15
Dependent Claim
42 words
A process according to claim 4, in which the layers of curable resin include at least one layer containing fibrous reinforcement, and the layer of resin immediately adjacent to the tie coat is a layer of curable resin containing no fibrous reinforcement.
Claim 16
Dependent Claim
42 words
A process according to claim 11, in which the layers of curable resin include at least one layer containing fibrous reinforcement and the layer of resin immediately adjacent to the tie coat is a layer of curable resin containing no fibrous reinforcement.
Claim 17
Dependent Claim
81 words
A boat whose underwater hull has its outermost surface formed of a continuous layer 5 to 500 microns thick of a non-biocidal antifouling material which does not release a poison for marine organisms but which resists the adhesion of marine fouling organisms, at least part of said non-biocidal antifouling material having fine grooves on its surface, said grooves extending in the longitudinal direction of the hull and having widths of 10 to 500 microns and depths or 5 to 100 microns.
Claim 18
Dependent Claim
81 words
A boat whose underwater hull has its outermost surface formed of a continuous layer 5 to 500 microns thick of a non-biocidal antifouling material which does not release a poison for marine organisms but which resists the adhesion of marine fouling organisms, at least part of said non-biocidal antifouling material having fine grooves on its surface, said grooves extending in the longitudinal direction of the hull and having widths of 10 to 500 microns and depths or 5 to 100 microns.
Claim 19
Dependent Claim
21 words
A boat according to claim 15, in which the grooves are in the form of rounded channels with cusps between them.
Claim 20
Dependent Claim
17 words
A boat according to claim 15, in which the non-biocidal antifouling material is a room-temperature-vulcanised silicone rubber.
Claim 21
Dependent Claim
91 words
An antifouling cladding for a boat's underwater hull or part thereof, the surface of the cladding which is intended to form the outer surface of the clad hull comprising a continuous layer 5 to 500 microns thick of a non-biocidal antifouling material which does not release a poison for marine organisms but which resists the adhesion of marine fouling organisms, said non-biocidal antifouling material having fine grooves extending in the longitudinal direction of the hull, the grooves having widths of 10 to 500 microns and depths of 5 to 100 microns.
Claim 22
Dependent Claim
91 words
An antifouling cladding for a boat's underwater hull or part thereof, the surface of the cladding which is intended to form the outer surface of the clad hull comprising a continuous layer 5 to 500 microns thick of a non-biocidal antifouling material which does not release a poison for marine organisms but which resists the adhesion of marine fouling organisms, said non-biocidal antifouling material having fine grooves extending in the longitudinal direction of the hull, the grooves having widths of 10 to 500 microns and depths of 5 to 100 microns.
Claim 23
Dependent Claim
19 words
An antifouling cladding according to claim 18, in which the cladding is based with a reinforcing flexible sheet material.
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) | 1993-08-13 | 1994-02-12 | 1994-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-13 | 1998-02-12 | 1998-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-13 | 2002-02-12 | 2002-08-14 | $7700.00 | Window Closed / Lapsed |