US2539202A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of dyeing animal fibers
Assignee: Individual
•
Filing: 1947-12-11
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Granted: 1951-01-23
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Expires: 1967-12-11
Abstract
No abstract record available.
Inventors
- 👤 Samuel M Peck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:03
CPC Classifications
A; A61; A61Q; A61Q5/00; A61Q5/06; A61Q5/065; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/40; A61K8/44; A61K8/64; A61K8/66; D; D06; D06P; D06P3/00; D06P3/02; D06P3/04; D06P3/30; D06P3/305
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
34 words
A METHOD OF DYEING KERATINACEOUS SUBSTANCES WHICH COMPRISES APPLYING TO THE SURFACE OF THE SUBSTANCE A PHYSIOLOGICALLY OCCURING PROPIGMENT OF THE CLASS CONSISTING OF DIOXYPHENYLALANINE AND TYROSINE, AND OXIDING THE PROPIGMENT IN SAID SUBSTANCE.
Claim 2
Independent Claim
34 words
A METHOD OF DYEING KERATINACEOUS SUBSTANCES WHICH COMPRISES APPLYING TO THE SURFACE OF THE SUBSTANCE A PHYSIOLOGICALLY OCCURING PROPIGMENT OF THE CLASS CONSISTING OF DIOXYPHENYLALANINE AND TYROSINE, AND OXIDING THE PROPIGMENT IN SAID SUBSTANCE.
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) | 1954-01-22 | 1954-07-24 | 1955-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-22 | 1958-07-24 | 1959-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-22 | 1962-07-24 | 1963-01-23 | $7700.00 | Window Closed / Lapsed |