Patent US2736323A successfully refreshed from Google Patents.
US2736323A
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Permanent waving solutions and method
Assignee: TIDE WATER PATENT DEV Co
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Filing: 1949-08-13
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Granted: 1956-02-28
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Expires: 1969-08-13
Abstract
No abstract record available.
Inventors
- 👤 Everett G Mcdonough
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:45
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/46; A61Q; A61Q5/00; A61Q5/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
114 words
A PERMANENT WAVING COMPOSITION COMPRISING A MERCAPTAN SELECTED FROM THE GROUP CONSISTING OF MERCAPTOACETIC ACID, MERCAPTO-PROPIONIC ACID, MERCAPTO-BUTYRIC ACID AND, MERCAPTO-CAPROIC ACID, IN A SOLUTION CONTAINING AN ALKALINE MATERIAL HAVING A DISSOCIATION CONSTANT LESS THAN 5X10-3, SAID SOLUTION HAVING A PH HIGHER THAN PH 7 AND NOT HIGHER THAN PH 9.5, THE CONCENTRATION OF SAID MERCAPTAN IN TERMS OF WEIGHT PER VOLUME RANGING FROM ABOUT 2% TO ABOUT 6%, THE CONCENTRATION OF MERCAPTAN AND THE PH OF THE SOLUTION BEING ADJUSTED WITHIN SAID RANGES TO OBTAIN A PERMANENT CHANGE IN THE CONFIGURATION OF HUMAN HAIR DURING A GIVEN TIME OF APPLICATION AT TEMPERATURES TOLERABLE TO THE HUMAN BODY WITHOUT DAMAGE TO THE HAIR STRUCTURE.
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US2405166A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-02-27 | 1959-08-29 | 1960-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-27 | 1963-08-29 | 1964-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-27 | 1967-08-29 | 1968-02-28 | $7700.00 | Window Closed / Lapsed |