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US 4,071,476 AGranted
Detergent builders and composition containing the same
AssigneeTexaco Inc.
InventorJohn A. Patterson
Life of this patent
Estimating the term…
Abstract
Disclosed and claimed are biodegradable builders for use with water-soluble organic detergent compounds. The builders are alkali metal salts of ester-acids derived from polycarboxylic acid anhydrides. Also claimed are a method for making the compounds and detergent compositions containing the disclosed compounds.
Claims2
A detergent builder selected from the group consisting of sodium carboxymethyl phthalate, sodium carboxymethyl tetrahydrophthalate, sodium carboxymethyl hexahydrophthalate, sodium carboxymethyl maleate and sodium sulfoethyl maleate.
Dependencies are inferred from the claim text.