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US 4,959,341 AGranted
Biodegradable superabsorbing sponge
AssigneeMicro Vesicular Systems, Inc.
InventorDonald F. H. Wallach
Life of this patent
Estimating the term…
Abstract
A new superabsorber which gels and cross-links as hydrated has been developed. The superabsorber contains a branched-chain polyanionic carbohydrate such as carboxymethylcellulose, a cross-linking agent, and a hydrophobic carboxylic acid. The superabsorber is biodegradable and non-toxic.
Claims14
A composition of matter which acts as a synthetic sponge when allowed to hydrate comprising a non-hydrated mixture of:
- a carboxylic acid with a substantial hydrophobic region;
- a branched complex carbohydrate;
- and
- a separate cross-linking agent;
- whereby said composition can be hydrated and cross-linked simultaneously in the presence of a hydrating solution.
2 more elements
A composition of matter which acts as a synthetic sponge when allowed to hydrate comprising a non-hydrated mixture of:
- undecylenic acid;
- and
- a branched complex carbohydrate;
- whereby said composition can be hydrated and cross-linked simultaneously in the presence of a hydrating solution.
1 more element
Dependencies are inferred from the claim text.