US3885577A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-assisted permanent waving system
Assignee: Helene Curtis Industries Inc
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Filing: 1974-01-11
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Granted: 1975-05-27
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Expires: 1994-01-11
Abstract
Abstract A heat-assisted ammonium thioglycolate permanent waving system is provided in which heat-containing clamps applied to the hair to assist the action of the ammonium thioglycolate bring the hair up to hair waving temperature and maintain it at such temperature for no more than 6 minutes and in which the ammonium thioglycolate solution is weaker than is used in non-heatassisted permanent waving for the same type of hair and stronger than has been used in prior heat-assisted permanent waving for the same type of hair.
Inventors
- 👤 Norman L Edelberg
- 👤 John R Forsberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:22
CPC Classifications
A; A61; A61Q; A61Q5/00; A61Q5/04; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/46; A61K2800/00; A61K2800/80; A61K2800/88; A61K2800/884
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
170 words
IN A HEAT-ASSISTED METHOD FOR THE PERMANENT WAVING OF HAIR IN WHICH AN AQUEOUS SOLUTION CONTANING AMMONIUM THIOGLYCOLATE IS APPLIED TO HAIR WOUND AROUND A ROLL TO WET SAID HAIR, THE WETTED HAIR IS MAINTAINED AT AN ELEVATED TEMPERATURE BY A HEATED CLAMP HOLDING SAID HAIR AROUND SAID ROLL, EXCESS AMMONIUM THIOGLYCOLATE SOLUTION IS THEN REMOVED AND AN OXIDIZING SOLUTION IS THEREAFTER APPLIED TO SAID HAIR TO NEUTRALIZE SAID AMMONIUM THIOGLYCOLATE SOLUTION, THE IMPROVEMENT WHICH COMPRISES PERMITTING SAID HEATED CLAMP TO HEAT SAID WETTED HAIR TO A TEMPERATURE ABOVE 120*F. AND TO MAINTAIN A TEMPERATURE ABOUT 120*F. FOR NO MORE THAN 6 MINUTES, SAID UTILIZING AS SAID AMMONIUM THIOGLYCOLATE SOLUTION, A SOLUTION OF GREATER SSTRENGTH THAN IS USED ON SIMILAR HAIR IN PRIOR HEATASSISTED PERMANENT WAVING AND OF LESSER STRENGTH THAN IS USED IN PRIOR NON-HEAT ASSISTED PERMENENT WAVING, SAID SOLUTION HAVING AN AMMONIUM THIOGLYCOLATE CONTENT IN THE RANGE BETWEEN 0.75$0.05 AND 9.7$0.1 WEIGHT PERCENT AND HAVING A PH IN THE RANGE BETWEEN 7.6 $ 0.1 ABD 9.35 $ 0.05.
Claim 2
Dependent Claim
170 words
IN A HEAT-ASSISTED METHOD FOR THE PERMANENT WAVING OF HAIR IN WHICH AN AQUEOUS SOLUTION CONTANING AMMONIUM THIOGLYCOLATE IS APPLIED TO HAIR WOUND AROUND A ROLL TO WET SAID HAIR, THE WETTED HAIR IS MAINTAINED AT AN ELEVATED TEMPERATURE BY A HEATED CLAMP HOLDING SAID HAIR AROUND SAID ROLL, EXCESS AMMONIUM THIOGLYCOLATE SOLUTION IS THEN REMOVED AND AN OXIDIZING SOLUTION IS THEREAFTER APPLIED TO SAID HAIR TO NEUTRALIZE SAID AMMONIUM THIOGLYCOLATE SOLUTION, THE IMPROVEMENT WHICH COMPRISES PERMITTING SAID HEATED CLAMP TO HEAT SAID WETTED HAIR TO A TEMPERATURE ABOVE 120*F. AND TO MAINTAIN A TEMPERATURE ABOUT 120*F. FOR NO MORE THAN 6 MINUTES, SAID UTILIZING AS SAID AMMONIUM THIOGLYCOLATE SOLUTION, A SOLUTION OF GREATER SSTRENGTH THAN IS USED ON SIMILAR HAIR IN PRIOR HEATASSISTED PERMANENT WAVING AND OF LESSER STRENGTH THAN IS USED IN PRIOR NON-HEAT ASSISTED PERMENENT WAVING, SAID SOLUTION HAVING AN AMMONIUM THIOGLYCOLATE CONTENT IN THE RANGE BETWEEN 0.75$0.05 AND 9.7$0.1 WEIGHT PERCENT AND HAVING A PH IN THE RANGE BETWEEN 7.6 $ 0.1 ABD 9.35 $ 0.05.
Claim 3
Dependent Claim
36 words
The method of claim 1 in which said hair is normal hair and said solution has a thioglycolate content of 9.7 + or - 0.1 weight percent and a pH of 7.6 + or - 0.1.
Claim 4
Dependent Claim
36 words
The method of claim 1 in which said hair is tinted hair and said solution has a thioglycolate content of 2.5 + or - 0.1 weight percent and a pH of 9.35 + or - 0.05.
Claim 5
Dependent Claim
38 words
The method of claim 1 in which said hair is resistant to permanent waving and said solution has a thioglycolate content of 8.5 + or - 0.1 weight percent and a pH of 8.4 + or - 0.1.
Claim 6
Dependent Claim
36 words
The method of claim 1 in which said hair is bleached hair and said solution has a thioglycolate content of 0.75 + or - 0.05 weight percent and a pH of 7.6 + or - 0.1.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-26 | 1978-11-25 | 1979-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-26 | 1982-11-25 | 1983-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-26 | 1986-11-25 | 1987-05-27 | $7700.00 | Window Closed / Lapsed |