Apparatus for treating dentures
AssigneeThe Procter & Gamble Company
InventorsMark Ieuan Edwards, Iain Allan Hughes
Life of this patent
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Abstract
Denture baths comprise an outer container for containing an aqueous composition; means for supporting a denture in the container, which means allow the denture to be immersed in the aqueous composition; and an aqueous composition. The aqueous composition comprises a polymeric coating agent having a surface tension in 0.1% aqueous solution of less than 37 mNm−1 and a weight average molecular weight of 1,000 or greater. In addition, the denture baths comprise a means for passing the denture through an interface of the aqueous composition with the surrounding air, the means being selected from means for draining the composition from a position beneath the denture and means for lifting the denture through the interface.
Claims17
A method for treating a denture, comprising:
- a) soaking the denture in an aqueous composition comprising a polymeric coating agent having a surface tension in 0.1% aqueous solution of less than 37 mNm−1 and a weight average molecular weight of 1,000 or greater, said composition having an interface with the surrounding air;
- and
- b) passing the denture through the interface by draining the composition from a position beneath the denture or by lifting the denture through the interface.
A method for coating a denture with a silicone or fluorocarbon polymer having a weight average molecular weight of 1,000 or greater, the method comprising the step of passing the denture through an interface between an aqueous composition comprising the polymer and the surrounding air, said interface having a rest surface area, whilst maintaining the surface area of the interface at about or below the rest surface area.
A method according to any preceding claim wherein the aqueous composition further comprises a persalt bleaching agent.
A method according to any preceding claim wherein the aqueous composition is prepared by dissolution in water of a tablet which effervesces on contact with water.
Use of a denture bath comprising:
- a) an outer container for containing an aqueous composition;
- b) means for supporting a denture in said container which allows said denture to be immersed in the aqueous composition;
- and
- c) an aqueous composition comprising a polymeric coating agent having a surface tension in 0.1% aqueous solution of less than 37 mNm−1 and a weight average molecular weight of 1,000 or greater;
- wherein the denture bath comprises a means for passing the denture through an interface of the aqueous composition with the surrounding air, said means being selected from means for draining the composition from a position beneath the denture and means for lifting the denture through the interface.
Dependencies are inferred from the claim text.