US2850351A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of reacting reduced keratin with cross-linking polyimides or polyamides and chemically modified keratin containing the aforesaid crosslinkages
Assignee: Individual
•
Filing: 1955-08-19
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Granted: 1958-09-02
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Expires: 1975-08-19
Abstract
No abstract record available.
Inventors
- 👤 Joseph E Moore
- 👤 Jr Clay E Pardo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:27
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/49; A61K8/494; A61K8/4966; A61K8/4906; A61K8/4913; A61K8/72; A61K8/84; A61K8/88; A61Q; A61Q5/00; A61Q5/04; D; D06; D06M; D06M13/00; D06M13/322; D06M13/402; A61K2800/00; A61K2800/80; A61K2800/94
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
A METHOD OF CHEMICALLY MODIFYING A KERATINOUS MATERIAL WHICH COMPRISES REACTING THE KERATINOUS MATERIAL WITH AN AGENT CAPABLE OF REDUCING DISULPHIDES AND WITH A COMPOUND CONTAINING AT LEAST TWO ACYL-NITROGEN GROUPS, EACH ACYL RADICAL CONTAINING AN OLEFINIC LINKAGE BETWEEN TWO CARBON ATOMS, AT LEAST ONE OF THESE CARBON ATOMS BEING DIRECTLY LINKED TO A NON-OXO CARBONYL GROUP OF THE SAID ACYL-NITROGEN GROUPS.
Claim 2
Independent Claim
62 words
A METHOD OF CHEMICALLY MODIFYING A KERATINOUS MATERIAL WHICH COMPRISES REACTING THE KERATINOUS MATERIAL WITH AN AGENT CAPABLE OF REDUCING DISULPHIDES AND WITH A COMPOUND CONTAINING AT LEAST TWO ACYL-NITROGEN GROUPS, EACH ACYL RADICAL CONTAINING AN OLEFINIC LINKAGE BETWEEN TWO CARBON ATOMS, AT LEAST ONE OF THESE CARBON ATOMS BEING DIRECTLY LINKED TO A NON-OXO CARBONYL GROUP OF THE SAID ACYL-NITROGEN GROUPS.
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) | 1961-09-01 | 1962-03-03 | 1962-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-01 | 1966-03-03 | 1966-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-01 | 1970-03-03 | 1970-09-02 | $7700.00 | Window Closed / Lapsed |