US2631965A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Permanent waving of hair
Assignee: Individual
•
Filing: 1950-05-24
•
Granted: 1953-03-17
•
Expires: 1970-05-24
Abstract
No abstract record available.
Inventors
- 👤 Ernst O Schnell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:01
CPC Classifications
A; A61; A61Q; A61Q5/00; A61Q5/04; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A HAIR WAVE PREPARATION COMPRISING A DILUTE AQUEOUS SOLUTION OF AN ALKALI THIOGLYCOLATE, SAID SOLUTION CONTAINING AN AMOUNT OF ALKALI RADICAL SUFFICIENT TO SATISFY THE REQUIREMENT TO HAVE SAID THIOGLYCOLIC ACID PRESENT IN THE FORM, AT LEAST MAINLY, OF A DI-ALKALI THIOGLYCOLATE, THE ALKALINITY OF SUCH SOLUTION BEING REPRESENTED BY A PH IN THE RANGE OF ABOUT 10 TO ABOUT 12.5, AND AN ADDED NON-REDUCING AMMONIUM SALT DISSOLVED IN SAID SOLUTION IN AMOUNTS SUFFICIENT TO LOWER THE INITIAL PH OF SAID SOLUTION TO WITHIN THE RANGE OF ABOUT 9.2 TO ABOUT 9.5.
Claim 2
Dependent Claim
92 words
A HAIR WAVE PREPARATION COMPRISING A DILUTE AQUEOUS SOLUTION OF AN ALKALI THIOGLYCOLATE, SAID SOLUTION CONTAINING AN AMOUNT OF ALKALI RADICAL SUFFICIENT TO SATISFY THE REQUIREMENT TO HAVE SAID THIOGLYCOLIC ACID PRESENT IN THE FORM, AT LEAST MAINLY, OF A DI-ALKALI THIOGLYCOLATE, THE ALKALINITY OF SUCH SOLUTION BEING REPRESENTED BY A PH IN THE RANGE OF ABOUT 10 TO ABOUT 12.5, AND AN ADDED NON-REDUCING AMMONIUM SALT DISSOLVED IN SAID SOLUTION IN AMOUNTS SUFFICIENT TO LOWER THE INITIAL PH OF SAID SOLUTION TO WITHIN THE RANGE OF ABOUT 9.2 TO ABOUT 9.5.
References Cited (Backward Citations)
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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) | 1956-03-16 | 1956-09-15 | 1957-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-16 | 1960-09-15 | 1961-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-16 | 1964-09-15 | 1965-03-17 | $7700.00 | Window Closed / Lapsed |