US2836185A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of permanently setting hair with a hair-swelling solution of a bisulfite and a nitrogen-containing component
Assignee: Arthur D Little Inc
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Filing: 1954-05-27
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Granted: 1958-05-27
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Expires: 1974-05-27
Abstract
No abstract record available.
Inventors
- 👤 Laurence R B Hervey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:06
CPC Classifications
A; A61; A61Q; A61Q5/00; A61Q5/04; A61K; A61K8/00; A61K8/18; A61K8/19; A61K8/23; A61K8/30; A61K8/40; A61K8/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
THE PROCESS OF PERMANENTLY SETTING HAIR IN A PREDETERMINED CONFIGURATION WHICH COMPRISES ADJUSTING SAID HAIR TO THE DESIRED CONFIGURATION, IMPARTING A CONTROLLED SWELLING TO SAID HAIR BY CONTACTING SAID HAIR AT A TEMPERATURE NOT HIGHER THAN 40*C. WITH A HAIR-SWELLING SOLUTION OF A SOLUBLE BISULFITE AND A NITROGEN-CONTAINING COMPONENT HAVING THE FORMULA
Claim 2
Dependent Claim
52 words
THE PROCESS OF PERMANENTLY SETTING HAIR IN A PREDETERMINED CONFIGURATION WHICH COMPRISES ADJUSTING SAID HAIR TO THE DESIRED CONFIGURATION, IMPARTING A CONTROLLED SWELLING TO SAID HAIR BY CONTACTING SAID HAIR AT A TEMPERATURE NOT HIGHER THAN 40*C. WITH A HAIR-SWELLING SOLUTION OF A SOLUBLE BISULFITE AND A NITROGEN-CONTAINING COMPONENT HAVING THE FORMULA
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) | 1961-05-26 | 1961-11-25 | 1962-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-26 | 1965-11-25 | 1966-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-26 | 1969-11-25 | 1970-05-27 | $7700.00 | Window Closed / Lapsed |