U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Stable hair relaxer

Patent 4237910 Issued on December 9, 1980. Estimated Expiration Date: Icon_subject September 24, 1999. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

1668608

2087953

2095374

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2691378

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Inventors

Assignee

Application

No. 06/078593 filed on 09/24/1979

US Classes:

132/202Hair treatment by application of specific chemical composition

Examiners

Primary: Ore, Dale R.

Attorney, Agent or Firm

International Classes

A61K 8/41 (20060101)
A61K 8/43 (20060101)
A61K 8/26 (20060101)
A61K 8/19 (20060101)
A61K 8/30 (20060101)
A61Q 5/04 (20060101)

Abstract

A no-base hair relaxer composition stable on aging for use under highly alkaline conditions is disclosed. The relaxer composition is comprised of a continuous water phase having dispersed therein about 3 to about 50 weight percent oleaginous material, about 7 to about 25 weight percent emulsifier and about 2 to about 30 weight percent of a lipophilic organically modified hectorite clay gellant. These compositions may be prepared by mixing and heating the oleaginous material, lipophilic hectorite gellant and less water soluble emulsifiers to about 80° C. to form the oil phase which contains no more than about 65 weight percent of the composition. Water and emulsifiers of high water solubility are mixed and heated to form the bulk of the aqueous phase, and then added to the oil phase. After continued agitation and maintenance of about 80° C., the composition is cooled to about 50° C. and sodium hydroxide and diluting water are added. The mixture is mixed further, force cooled about 25° C. and homogenized.

Other References

  • Billups, Amer. Journ. of Pharm., Phila., 9-10/1964, pp. 183-205
  • Billups, Amer. Journ. of Pharm., Phila., vol. 3-4/1965, pp. 57-68
  • Howze et al., Amer. Journ. of Pharm., Phila., vol. 138, No. 5, pp. 193-203
  • Billups et al., Amer. Journ. of Pharm. Educ., 5/1970, vol. 34, pp. 190-196
  • The Bentone Gellants Handbook of Practical Applications
  • NL Industries Pigments & Chemicals
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