US2774355A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Permanent hair waving neutralization by monopersulfate
Assignee: EIDP Inc
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Filing: 1955-03-23
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Granted: 1956-12-18
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Expires: 1975-03-23
Abstract
No abstract record available.
Inventors
- 👤 Thomas E Bell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:35
CPC Classifications
A; A61; A61Q; A61Q5/00; A61Q5/04; A61K; A61K8/00; A61K8/18; A61K8/19; A61K8/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
THE PROCESS OF RESTORING DISULFIDE LINKAGES TO HAIR IN WHICH THE LINKAGES HAVE BEEN DISRUPTED BY REDUCTION COMPRISING TREATING SAID HAIR WITH AN AQUEOUS SOLUTION CONTAINING BETWEEN ABOUT 500 AND 2000 P.P.M. OF ACTIVE OXYGEN BOUND IN THE FORM OF THE MONOPERSULFATE OF AN ALKALI METAL, SAID TREATMENT BEING CARRIED OUT AT A PH OF ABOUT 2-3 AND A TEMPERATURE OF ABOUT 20-40* C. FOR NOT MORE THAN ABOUT 5 MINUTES.
Claim 2
Dependent Claim
71 words
THE PROCESS OF RESTORING DISULFIDE LINKAGES TO HAIR IN WHICH THE LINKAGES HAVE BEEN DISRUPTED BY REDUCTION COMPRISING TREATING SAID HAIR WITH AN AQUEOUS SOLUTION CONTAINING BETWEEN ABOUT 500 AND 2000 P.P.M. OF ACTIVE OXYGEN BOUND IN THE FORM OF THE MONOPERSULFATE OF AN ALKALI METAL, SAID TREATMENT BEING CARRIED OUT AT A PH OF ABOUT 2-3 AND A TEMPERATURE OF ABOUT 20-40* C. FOR NOT MORE THAN ABOUT 5 MINUTES.
References Cited (Backward Citations)
US2362401A
Cited
DE561521C
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US2077103A
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GB453700A
Cited
US2334126A
Cited
US2426142A
Cited
FR1003963A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-18 | 1960-06-18 | 1960-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-18 | 1964-06-18 | 1964-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-18 | 1968-06-18 | 1968-12-18 | $7700.00 | Window Closed / Lapsed |