Compositions – Compositions containing a single chemical reactant or plural... – Organic reactant
Patent
1989-07-07
1991-09-10
Willis, Prince E.
Compositions
Compositions containing a single chemical reactant or plural...
Organic reactant
252DIG16, 252108, 252117, 424 73, 514547, C11D 906, C11D 1504, C11D 108, C07C 6974
Patent
active
050471660
ABSTRACT:
A skin treatment composition comprising a physiologically acceptable carrier and 1-35% by weight of a salt of a monoester of citric acid. The skin treatment composition imparts a pleasant smoothness to the skin and may be incorporated in several products to treat skin dryness. The hydrophobic group having an ester linkage to citric acid has 10 to 18 carbon atoms. Monoester of citric acid may be synthesized with low levels of di- and triester by forming citric acid anhydride and reacting this to form the monoester.
REFERENCES:
patent: 4673525 (1987-06-01), Small et al.
patent: 4695395 (1987-09-01), Caswell et al.
patent: 4866202 (1989-09-01), Weil
Antedating Prior Art with Constructive Reductions to Practice Under Rule 131. Part II: After In re Gosteli.
Antendating Prior Art with Constructive Reductions to Practice Under Rule 131. Part I; Before In re Gosteli.
In re Clark 148, USPQ 665 (CCPA 1966).
In re Spiller 182, USPQ 614 (CCPA 1974).
In re Stempel 113, USPQ 77 (CCPA 1957).
In re Stryker 168, USPQ 372 (CCPA 1971).
Chemical Abstract 93:31633h (1980) Stork, Karl.
Farrell James J.
Lever Brothers Company Division of Conopco, Inc.
Silbermann J.
Willis Prince E.
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