Colloidal suspensions
OwnerRamos Mays, Craig Herbinventors
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Abstract
Presented are compositions that when applied in a spatial manner so as to encode information, can remotely detected. Such compositions have liquid properties that make them adaptable to delivery by means such as a jet or needle injector. Instant compositions comprise a particulate material, a suspending agent, and a dispersing agent. Also taught are readable codes made by such compositions, and methods of applying such compositions. Other uses of such compositions are also taught
Claims31
A composition comprising a particulate material suspended in a carrier medium comprising:
- (a) a suspending concentration of a suspending agent;
- optionally about 0.01% to about 10% or about 0.25% to about 1.5% or about 0.25% to about 1% (W/W);
- (b) a dispersing concentration of a dispersing agent;
- (c) a liquid;
- and optionally
- (d) one or more excipients,
- wherein the particulate material:
- (i) has a dielectric constant of greater than 35 at one or more frequencies between 10 GHz and 1000 GHz at 37° C.;
- (iii) has a mass average diameter of about 200 nm to about 50 μm and optionally where the upper limit is not more than about 100 μm in diameter, and
- (iv) is at a concentration of about 1% to about 50%;
- optionally about 2% to about 30% or about 4% to about 16% (V/V).
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A method for preparing a biocompatible composition, comprising the steps:
- (a) contacting a biocompatible liquid with a biocompatible particulate material;
- (b) adding a suspending concentration of a suspending agent;
- (c) adding a dispersing concentration of a dispersing agent;
- and
- (d) optionally adding at least one polymer stabilizer;
- wherein the biocompatible, microwave-readable particulate material:
- (i) has a dielectric constant of greater than 35 at one or more frequencies between 10 GHz and 1000 GHz at 37° C.;
- (ii) has a mass average diameter of about 200 nm to about 50 μm and optionally where the upper limit is not more than about 100 μm in diameter, and
- (iii) is at a concentration of about 1% to about 50%;
- optionally about 2% to about 30% or about 4% to about 16% (V/V).
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Dependencies are inferred from the claim text.