US2955016A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modification of keratins with sulphones and related compounds
Assignee: Individual
•
Filing: 1956-10-15
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Granted: 1960-10-04
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Expires: 1976-10-15
Abstract
No abstract record available.
Inventors
- 👤 Joseph E Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:26
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/244; D06M13/248; D06M13/272; D06M13/278; D06M13/282; D06M13/313; Y; Y10; Y10S; Y10S8/00; Y10S8/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
METHOD OF CHEMICALLY MODIFYING A KERATIN WHICH COMPRISES REDUCING THE KERATIN BY REACTING IT WITH A SULPHUR-CONTAINING, REDUCTIVE, DISULPHIDE-SPLITTING AGENT CAPABLE OF CONVERTING THE -S-S- BOND OF THE KERATIN INTO TWO THIOL (-SH) GROUPS, AT A PH OF ABOUT 5 TO 7, THEN REACTING THE REDUCED KERATIN AT A TEMPERATURE ABOUT FROM 20 TO 100* C. WITH A COMPOUND CONTAINING TWO TO THREE OLEFINIC UNSATURATED GROUPS, EACH OF SAID GROUPS BEING DIRECTLY LINKED TO A RADICAL SELECTED FROM THE CLASS CONSISTING OF THE SULPHONE, SULPHOXIDE, AND PHOSPHINE OXIDE RADICALS.
Claim 2
Dependent Claim
89 words
METHOD OF CHEMICALLY MODIFYING A KERATIN WHICH COMPRISES REDUCING THE KERATIN BY REACTING IT WITH A SULPHUR-CONTAINING, REDUCTIVE, DISULPHIDE-SPLITTING AGENT CAPABLE OF CONVERTING THE -S-S- BOND OF THE KERATIN INTO TWO THIOL (-SH) GROUPS, AT A PH OF ABOUT 5 TO 7, THEN REACTING THE REDUCED KERATIN AT A TEMPERATURE ABOUT FROM 20 TO 100* C. WITH A COMPOUND CONTAINING TWO TO THREE OLEFINIC UNSATURATED GROUPS, EACH OF SAID GROUPS BEING DIRECTLY LINKED TO A RADICAL SELECTED FROM THE CLASS CONSISTING OF THE SULPHONE, SULPHOXIDE, AND PHOSPHINE OXIDE RADICALS.
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) | 1963-10-04 | 1964-04-04 | 1964-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-04 | 1968-04-04 | 1968-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-04 | 1972-04-04 | 1972-10-04 | $7700.00 | Window Closed / Lapsed |