Abstract: There is disclosed a visually clear colored dentifrice comprising a liquid vehicle having a refractive index between about 1.36 and 1.47, up to about 10% by weight of a gelling agent, about 5-50% by weight of a polishing material having a refractive index similar to that of that of the said liquid vehicle, such that the said dentifrice is visually clear in appearance when the said polishing material is dispersed in the said liquid vehicle and about 0.004-1% by weight of a lake pigment insoluble in water and in the said liquid vehicle, the said lake pigment containing an inherently colorless substrate.

Abstract: A dental cream of desirable rheological properties containing a gelling agent system comprising hydroxyethyl cellulose and sodium carboxymethyl cellulose in a weight ratio of about 3:2 to 2:3.

Abstract: A dental cream containing high viscosity hydroxyethyl cellulose gelling agent, a calcium phosphate polishing agent and a binary source of fluorine of sodium fluoride and sodium monofluorophosphate.

Abstract: A dentifrice is described comprising an aqueous phase containing aluminium and an oil phase containing fluoride, the immiscibility and physiochemical properties of the phases resulting in a "dual action" effect on dentition to which this dentifrice is applied by substantially separate treatment with aluminium and then fluoride.

Abstract: A hazed toothpaste which can effect dental remineralization and reduce caries formation. The toothpaste contains a binary fluorine-providing system which provides about 750-1225 ppm fluoride from sodium monofluorophosphate and about 50-1000 ppm fluorine from sodium fluoride and a synthetic precipitated siliceous polishing agent. The toothpaste is stabilized against gassing in an unlined aluminium tube by the presence of a dicalcium phosphate which exerts a hazing effect on the toothpaste. Dicalcium phosphate also reduces color fading when a water-soluble dye is present. Additional haze to permit opacification of the toothpaste may be introduced by the presence of an opacifying agent, such as titanium dioxide.

Abstract: A rheologically smooth opaque dentifrice containing a siliceous polishing material, at least about 35% by weight of water, sodium alkyl sulfate surface active agent wherein the alkyl group contains 10-18 carbon atoms, with about 40-70% being C.sub.12 and about 0.1-15% by weight of an alkylene diamine tetramethylene phosphonic acid water soluble salt.

Abstract: A dentifrice comprising sodium metaphosphate as a polishing agent and an anionic alkali metal salt of a substantially saturated higher fatty alcohol alkylene oxide sulphate surface active agent is disclosed, the dentifrice having a reduced tendancy to cause sloughing or desquamation.

Abstract: A dentifrice composition is disclosed utilizing a gelling agent consisting essentially of xanthan and guar gums in specified ratios.

Abstract: A toothpaste of improved rheological properties wherein drying and plug formation is reduced or prevented. The toothpaste contains a vehicle in which there is present about 45-85% by weight of liquid phase containing up to about 35% by weight of sorbitol and at least about 25% by weight of water and a solid phase including about 0.5-10% by weight of gelling agent. Drying and plug formation is reduced by including in the liquid phase about 5-20% by weight of polyethylene glycol having an average molecular weight between about 900 and 1600.

Abstract: A dental cream composition containing a binary fluorine providing system which provides about 1000-1670 ppm (0.1-0.16% by weight) fluorine from sodium monofluorophosphate and sodium fluoride wherein sodium fluoride provides about 30-35% by weight of the fluorine in amount of about 300-580 ppm (0.02-0.058% by weight). The dental cream contains a vehicle for the binary fluorine-providing system and about 20-75% by weight of a dentally acceptable water-insoluble polishing agent consisting essentially of dicalcium phosphate intimately dispersed in the vehicle and in direct contact with the binary fluorine-providing system. The dental cream is effective in retaining soluble fluorine and soluble fluoride, in effecting reduction of enamel solubility and in remineralization of dental enamel.

Abstract: An opacified dental cream which effects dental remineralization and reduces caries formation. The opacified dental cream contains a binary fluorine providing system which provides fluorine from sodium monofluorophosphate and from sodium fluoride, a synthetic precipitated silica containing up to about 1% by weight of alumina polishing agent and an opacifying agent.

Abstract: A dentifrice comprising an impure insoluble sodium metaphosphate polishing agent is disclosed, the dentifrice using a mixture of anionic phosphates esters as a surface active agent, to reduce or prevent a tendency to cause sloughing or desquamation.

Abstract: A toothpaste composition comprising a vehicle containing about 45-80% by weight of liquid phase, comprising up to about 35% by weight of the toothpaste of sorbitol and at least about 25% by weight of the toothpaste of water and a solid phase including about 3-10% by weight of the toothpaste of gelling agent comprising at least about 3% by weight of the toothpaste of polyvinyl pyrrolidone as an agent to reduce drying and tube plugging.

Abstract: An additive, 0.05% to 5% of phytic acid, a chelator, unlike other chelators such as tartaric acid or ethylene diamine tetra acetic acid, prevents or reduces color fading of from 0.0007% to 0.5% of a water-soluble non-toxic red or yellow monoazo or blue triarylmethane dye-colored visually clear dentrifice containing both alkali metal monofluorophosphate in an amount to provide from 0.01% to 1% of fluorine and from 5% to 50% of a selected siliceous polishing agent having an index of refraction between 1.44 and 1.47, in a liquid vehicle having an index of refraction matching that of said siliceous polishing agent.

Abstract: A periodontal dental composition is disclosed comprising folic acid and a polishing agent which is principally dicalcium phosphate.

Abstract: A periodontal dental preparation is disclosed comprising folic acid, a dentally acceptable water-insoluble polishing agent which reduces the soluble folic acid present in the preparation and a fluorine-containing agent which increases retention of soluble folic acid in said preparation, the fluorine-containing agent comprising an alkali metal fluoride, and alkali metal monofluorophosphate, or a mixture thereof.

Abstract: A dentifrice containing a siliceous polishing agent and an alkali metal fluoride or monofluorophosphate, a dye and an additive which prevents or reduces color fading which additive is benzoic acid and/or phytic acid when alkali metal monofluorophosphate is present and which is benzoic acid when alkali metal fluoride is present.

Abstract: A clear gel dentifrice containing "narrow cut" alkali metal lauryl sulphate in which the C.sub.12 content is at least 90% by weight of the total alkyl content and a fluorine providing compound. The dentifrice contains a further anionic surface active agent which is a substantially saturated higher aliphatic acyl amide of a lower aliphatic amino carboxylic acid salt, a substantially saturated higher fatty aliphatic alcohol alkylene oxide sulphate or a mixture of mono- and di- phosphate esters.

Abstract: Toothpaste composition having desirable compatibility with an unlimited aluminum container, which toothpaste contains a polishing material comprising hydrate of alumina and an anionic phosphate mono- or di-ester.

Abstract: A detection circuitry designed to sense a composite signal of the type such as composite frequency shift keying (FSK) 50% amplitude modulated (AM) signal or pulse code modulated return to zero FSK type signal. The circuitry includes means for separating the composite signal into its constituent components and means for converting the separated signals into an amplitude envelope signal and a differentiated DC component. The circuitry includes a trigger circuitry for providing an output signal when the input thereof is of a predetermined polarity and amplitude and means including peak detection circuitry for applying the amplitude envelope and DC component so that the polarity of the differentiated DC component is applied to the trigger circuitry in the predetermined polarity so that the DC component is additive to the amplitude envelope, whereby the speed with which the trigger responds to the start and the end of the incoming composite signal is fast.