US3973510A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Submersible object having drag reduction and method
Assignee: United States Department of the Navy
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Filing: 1974-09-09
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Granted: 1976-08-10
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Expires: 1994-09-09
Abstract
Abstract A submersible object having a drag reducing coating thereon, and a method r its preparation, which comprises applying to the object a binding agent and sufficient hydrophobic silica to provide the object with a nonuniform coating, the function of the binding agent being merely to fix the hydrophobic silica on the submersible object.
Inventors
- 👤 Charles R. McCulloch
- 👤 Robert C. Gill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:44
CPC Classifications
B; B63; B63B; B63B1/00; B63B1/32; B63B1/34; C; C09; C09D; C09D5/00; C09D5/16; Y; Y02; Y02T; Y02T70/00; Y02T70/10; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/24372; Y10T428/24421; Y10T428/2443; Y10T428/25; Y10T428/252; Y10T428/259
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
48 words
A submersible object having a polymeric drag reducing coating on the water contacting surface of the submersible object, wherein the improvement comprises the incorporation in said polymeric coating of at least 50% by weight of hydrophobic silica in order to produce a nonuniform coating on the submersible object.
Claim 2
Dependent Claim
48 words
A submersible object having a polymeric drag reducing coating on the water contacting surface of the submersible object, wherein the improvement comprises the incorporation in said polymeric coating of at least 50% by weight of hydrophobic silica in order to produce a nonuniform coating on the submersible object.
Claim 3
Dependent Claim
14 words
The object of claim 1 wherein said coating includes a marine growth reducing agent.
Claim 4
Independent Claim
94 words
A method of reducing drag on a submersible object which comprises coating the water contacting surface of the object with an uncured, tacky binding agent selected from the group consisting of an epoxy resin, a polyether resin, a polyester resin, a polyurethane resin, a polyhydrocarbon resin, a polyperfluorinated hydrocarbon resin, a polysiloxane resin and mixtures thereof, applying a coating of hydrophobic silica to said tacky binding agent; and curing said tacky binding agent, the binding agent causing the hydrophobic silica to adhere firmly to said object, thus providing said object with a nonuniform coating.
Claim 5
Independent Claim
94 words
A method of reducing drag on a submersible object which comprises coating the water contacting surface of the object with an uncured, tacky binding agent selected from the group consisting of an epoxy resin, a polyether resin, a polyester resin, a polyurethane resin, a polyhydrocarbon resin, a polyperfluorinated hydrocarbon resin, a polysiloxane resin and mixtures thereof, applying a coating of hydrophobic silica to said tacky binding agent; and curing said tacky binding agent, the binding agent causing the hydrophobic silica to adhere firmly to said object, thus providing said object with a nonuniform coating.
Claim 6
Independent Claim
88 words
A method of reducing drag on a submersible object which comprises blending hydrophobic silica with an uncured binding agent selected from the group consisting of an epoxy resin, a polyether resin, a polyester resin, a polyurethane resin, a polyhydrocarbon resin, a polyperfluorinated hydrocarbon resin, a polysiloxane resin, and mixtures thereof to form a coating material containing at least 50% hydrophobic silica by weight; applying said coating material to the water contacting surface of said object; and curing said coating material, thus providing said object with a nonuniform coating.
Claim 7
Independent Claim
88 words
A method of reducing drag on a submersible object which comprises blending hydrophobic silica with an uncured binding agent selected from the group consisting of an epoxy resin, a polyether resin, a polyester resin, a polyurethane resin, a polyhydrocarbon resin, a polyperfluorinated hydrocarbon resin, a polysiloxane resin, and mixtures thereof to form a coating material containing at least 50% hydrophobic silica by weight; applying said coating material to the water contacting surface of said object; and curing said coating material, thus providing said object with a nonuniform coating.
Claim 8
Dependent Claim
74 words
A submersible object having on the water contacting surface of the object a nonuniform coating consisting essentially of hydrophobic silica and a binding agent selected from the group consisting of an epoxy resin, a polyether resin, a polyester resin, a polyurethane resin, a polyhydrocarbon resin, a polyperfluorinated hydrocarbon resin, a polysiloxane resin, and mixtures thereof, wherein the binding agent forms a base coat, and the hydrophobic silica forms a top coat on said object.
Claim 9
Dependent Claim
74 words
A submersible object having on the water contacting surface of the object a nonuniform coating consisting essentially of hydrophobic silica and a binding agent selected from the group consisting of an epoxy resin, a polyether resin, a polyester resin, a polyurethane resin, a polyhydrocarbon resin, a polyperfluorinated hydrocarbon resin, a polysiloxane resin, and mixtures thereof, wherein the binding agent forms a base coat, and the hydrophobic silica forms a top coat on said object.
Claim 10
Dependent Claim
79 words
A submersible object having on the water contacting surface of the object a nonuniform coating consisting essentially of hydrophobic silica and a binding agent selected from the group consisting of an epoxy resin, a polyether resin, a polyester resin, a polyurethane resin, a polyhydrocarbon resin, a polyperfluorinated hydrocarbon resin, a polysiloxane resin, and mixtures thereof, wherein the coating is a mixture of hydrophobic silica and binding agent, and wherein the mixture contains at least 50% hydrophobic silica by weight.
Claim 11
Dependent Claim
79 words
A submersible object having on the water contacting surface of the object a nonuniform coating consisting essentially of hydrophobic silica and a binding agent selected from the group consisting of an epoxy resin, a polyether resin, a polyester resin, a polyurethane resin, a polyhydrocarbon resin, a polyperfluorinated hydrocarbon resin, a polysiloxane resin, and mixtures thereof, wherein the coating is a mixture of hydrophobic silica and binding agent, and wherein the mixture contains at least 50% hydrophobic silica by weight.
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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) | 1979-08-10 | 1980-02-09 | 1980-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-10 | 1984-02-09 | 1984-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-10 | 1988-02-09 | 1988-08-10 | $7700.00 | Window Closed / Lapsed |