Patent US3973574A successfully refreshed from Google Patents.
US3973574A
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Waving and straightening hair by producing metal chelates in the keratin of the hair
Assignee: Individual
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Filing: 1973-12-07
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Granted: 1976-08-10
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Expires: 1993-12-07
Abstract
Abstract Method for waving and straightening hair by carrying out a metallic chelate reaction in the keratin of the hair by incorporating an alkali metal or ammonium ions or an organic amine into the hair keratin protein, thereafter replacing the alkali metal or ammonium ions or organic amine by metal ions, other than alkali metal ions, said metal ions having a greater atomic weight than that of alkali metal or ammonium ions replaced, said metal ions being derived from aqueous solutions of metal salts other than alkali metals, metal chelate compounds of enzymes, proteins, peptides or amino acids and the lotions and creams as used in the aforesaid method.
Inventors
- 👤 Toyosaku Minagawa, deceased
- 👤 Yuzi Hazaka
- 👤 Fumio Umezawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:17
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/40; A61K8/41; A45; A45D; A45D7/00; A45D7/04; A61Q; A61Q5/00; A61Q5/04; A61Q5/06; A61Q5/065
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
138 words
A two-stage treatment for curling initially straight hair or straightening initially curly hair, which comprises arranging the hair in one of said curled or straight configurations different from the configuration of the untreated hair, soaking the hair so arranged with a first aqueous solution consisting essentially of 0.2-8% of at least one of a water-soluble organic amine, a water-soluble alkali metal hydroxide, a salt of an alkali metal, ammonium hydroxide or an ammonium salt having a pH of about 8-13 and while said hair is so soaked, soaking the still arranged hair with a second aqueous solution consisting essentially of 0.1-5% of a water-soluble salt of a metal which has an atomic weight heavier than an alkali metal and is adapted to form a chelate complex with hair keratin for a sufficient time to form said chelate complex.
Claim 2
Dependent Claim
138 words
A two-stage treatment for curling initially straight hair or straightening initially curly hair, which comprises arranging the hair in one of said curled or straight configurations different from the configuration of the untreated hair, soaking the hair so arranged with a first aqueous solution consisting essentially of 0.2-8% of at least one of a water-soluble organic amine, a water-soluble alkali metal hydroxide, a salt of an alkali metal, ammonium hydroxide or an ammonium salt having a pH of about 8-13 and while said hair is so soaked, soaking the still arranged hair with a second aqueous solution consisting essentially of 0.1-5% of a water-soluble salt of a metal which has an atomic weight heavier than an alkali metal and is adapted to form a chelate complex with hair keratin for a sufficient time to form said chelate complex.
Claim 3
Dependent Claim
36 words
The treatment of claim 1 wherein at least one of said solutions also contains an anionic or non-ionic surfactant in the amount of 0.1-2% and said solutions are applied to the hair at about room temperature.
Claim 4
Dependent Claim
31 words
The treatment of claim 1 wherein in said first aqueous solution said salt is a carbonate, a bicarboxate, an oxalate, a tartrate or a citrate of said alkali metal or ammonium.
Claim 5
Dependent Claim
16 words
The treatment of claim 1 wherein said first solution has a pH of at least 10.
Claim 6
Dependent Claim
123 words
A one-stage treatment for curling initially straight hair or straightening initially curly hair, which comprises arranging the hair in one of said curled or straight configurations different from the configuration of the untreated hair, soaking the hair so arranged with an aqueous solution having a pH of about 8-13 consisting essentially of 0.2-8% of at least one of a water-soluble organic amine, a water-soluble alkali metal hydroxide, a salt of an alkali metal, ammonium hydroxide or an ammonium salt, and 0.1-5% of a salt of a metal having an atomic weight heavier than an alkali metal, which salt has significant water-solubility at said pH and releases ions of said metal in aqueous solution, and said metal forming a chelate complex with hair keratin.
Claim 7
Dependent Claim
123 words
A one-stage treatment for curling initially straight hair or straightening initially curly hair, which comprises arranging the hair in one of said curled or straight configurations different from the configuration of the untreated hair, soaking the hair so arranged with an aqueous solution having a pH of about 8-13 consisting essentially of 0.2-8% of at least one of a water-soluble organic amine, a water-soluble alkali metal hydroxide, a salt of an alkali metal, ammonium hydroxide or an ammonium salt, and 0.1-5% of a salt of a metal having an atomic weight heavier than an alkali metal, which salt has significant water-solubility at said pH and releases ions of said metal in aqueous solution, and said metal forming a chelate complex with hair keratin.
Claim 8
Dependent Claim
17 words
The treatment of claim 5 wherein said solution also contains 0.1-2% of an anionic or non-ionic surfactant.
Claim 9
Dependent Claim
138 words
A one-stage treatment for curling initially straight hair or straightening initially curly hair, which comprises arranging the hair in one of said curled or straight configurations different from the configuration of the untreated hair, soaking the hair so arranged with an aqueous solution consisting essentially of 0.1-2% of an anionic or non-ionic surfactant, 2-10% of a water-soluble chelate, said chelate being of an enzyme, a protein, or an amino acid with a metal which has an atomic weight heavier than an alkali metal and is adapted to form a chelate complex with hair keratin, and at least one of a water-soluble organic amine, an alkali metal hydroxide, a salt of an alkali metal, ammonium hydroxide or an ammonium salt, having a pH of from 7-12, for a time sufficient to form a chelate complex with the hair keratin.
Claim 10
Dependent Claim
138 words
A one-stage treatment for curling initially straight hair or straightening initially curly hair, which comprises arranging the hair in one of said curled or straight configurations different from the configuration of the untreated hair, soaking the hair so arranged with an aqueous solution consisting essentially of 0.1-2% of an anionic or non-ionic surfactant, 2-10% of a water-soluble chelate, said chelate being of an enzyme, a protein, or an amino acid with a metal which has an atomic weight heavier than an alkali metal and is adapted to form a chelate complex with hair keratin, and at least one of a water-soluble organic amine, an alkali metal hydroxide, a salt of an alkali metal, ammonium hydroxide or an ammonium salt, having a pH of from 7-12, for a time sufficient to form a chelate complex with the hair keratin.
Claim 11
Dependent Claim
23 words
The treatment of claim 7 wherein said water-soluble chelate is a chelate of said metal with peptone, casein, amylase, protease, lipase or histidine.
References Cited (Backward Citations)
US3352624A
Cited
US2056358A
Cited
US2169147A
Cited
US2707697A
Cited
US2719104A
Cited
US2990832A
Cited
US3079213A
Cited
US3075821A
Cited
US3215605A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-10 | 1980-02-09 | 1980-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-10 | 1984-02-09 | 1984-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-10 | 1988-02-09 | 1988-08-10 | $7700.00 | Window Closed / Lapsed |