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US 2024/0400845 A1Published application
Opaque ink composition
AssigneeSanford, L.P.
InventorVincent Kwan
Life of this patent
Estimating the term…
Abstract
Compositions for use in writing instruments that provide for an opaque and permanent application and include a unique combination of a hollow particle component, a colorant, a viscosity modifier, a humectant, and an optional dispersant that result in shear-thinning properties.
Claims20
A composition, comprising:
- a hollow particle component;
- a first colorant;
- a viscosity modifier;
- a humectant;
- and
- a solvent.
3 more elements
A permanent ink composition comprising:
- a hollow particle component;
- a first colorant;
- a viscosity modifier;
- a humectant;
- a solvent;
- and
- an optional dispersant, wherein the composition has a first viscosity at a non-shear state and a second viscosity at a shear state, and wherein the second viscosity is less than the first viscosity.
4 more elements
An ink composition for use in a writing utensil, comprising:
- a hollow particle component;
- at least one colorant;
- a viscosity modifier;
- a humectant;
- and
- a solvent,
- wherein the ink composition is included in an ink storage compartment of the writing utensil.
4 more elements
Dependencies are inferred from the claim text.