Patent US2506492A successfully refreshed from Google Patents.
US2506492A
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Stabilized sulfite solutions
Assignee: RAYMOND LAB Inc
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Filing: 1946-07-27
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Granted: 1950-05-02
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Expires: 1966-07-27
Abstract
No abstract record available.
Inventors
- 👤 Mytt Louis De
- 👤 Raymond E Reed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:42
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/19; A61K8/23; A61Q; A61Q5/00; A61Q5/04; Y; Y10; Y10S; Y10S424/00; Y10S424/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
STABLE ALKALINE SULFITE HAIR WAVING SOLUTION COMPRISING AN ALKALINE SULFITE SALT AND AN ALKALINE BUFFERING SALT TO BUFFER THE SOLUTION THEREOF IN THE SUBSTANTIALLY ALKALINE PH RANGE, DISSLOVED IN WATER CONTAINING SMALL QUANTITIES OF MULTIVALENT IONS OF AT LEAST ONE METAL SELECTED FROM THE GROUP CONSISTING OF COPPER, COBALT, MANGANESE AND IRON NORMALLY TENDING TO ACELERATE OXIDATION OF THE SULFITE AND A SMALL QUANTITY OF A SEQUESTERING AGENT FOR SAID IONS, SELECTED FROM THE GROUP CONSISTING OF WATER-SOLUBLE TERTIARY AMINO POLYCARBOXYLIC ACIDS AND SALTS THEREOF.
Claim 2
Dependent Claim
85 words
STABLE ALKALINE SULFITE HAIR WAVING SOLUTION COMPRISING AN ALKALINE SULFITE SALT AND AN ALKALINE BUFFERING SALT TO BUFFER THE SOLUTION THEREOF IN THE SUBSTANTIALLY ALKALINE PH RANGE, DISSLOVED IN WATER CONTAINING SMALL QUANTITIES OF MULTIVALENT IONS OF AT LEAST ONE METAL SELECTED FROM THE GROUP CONSISTING OF COPPER, COBALT, MANGANESE AND IRON NORMALLY TENDING TO ACELERATE OXIDATION OF THE SULFITE AND A SMALL QUANTITY OF A SEQUESTERING AGENT FOR SAID IONS, SELECTED FROM THE GROUP CONSISTING OF WATER-SOLUBLE TERTIARY AMINO POLYCARBOXYLIC ACIDS AND SALTS THEREOF.
References Cited (Backward Citations)
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Cited
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Cited
US2061709A
Cited
US2073923A
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US2110274A
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US2168181A
Cited
US2420122A
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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) | 1953-05-01 | 1953-10-31 | 1954-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-01 | 1957-10-31 | 1958-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-01 | 1961-10-31 | 1962-05-02 | $7700.00 | Window Closed / Lapsed |