US2541804A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of artificial protein fibers
Assignee: Akzo Nobel UK PLC
•
Filing: 1950-06-20
•
Granted: 1951-02-13
•
Expires: 1970-06-20
Abstract
No abstract record available.
Inventors
- 👤 Robert L Wormell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:20
CPC Classifications
D; D01; D01F; D01F4/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A PROCESS FOR THE PRODUCTION OF PROTEIN FIBRES SOLUBLE IN DILUTE ALKALINE SOLUTIONS COMPRISING EXTRUDING AN ALKALINE PROTEIN SOLUTION INTO A COAGULANT BATH CONTAINING AT LEAST ONE METAL SALT TO COAGULATE THE PROTEIN, STRETCHING THE RESULTANT THREAD AT LEAST 50 PER CENT, RENDERING THE STRETCHED THREAD RESISTANT TO COLD WATER BY TREATMENT WITH AN AQUEOUS BATH CONTAINING CHLORAL AND DRYING THE THUS HARDENED THREAD, THE ENTIRE PROCESS BEING EFFECTED IN THE ABSENCE OF FORMALDEHYDE.
Claim 2
Dependent Claim
74 words
A PROCESS FOR THE PRODUCTION OF PROTEIN FIBRES SOLUBLE IN DILUTE ALKALINE SOLUTIONS COMPRISING EXTRUDING AN ALKALINE PROTEIN SOLUTION INTO A COAGULANT BATH CONTAINING AT LEAST ONE METAL SALT TO COAGULATE THE PROTEIN, STRETCHING THE RESULTANT THREAD AT LEAST 50 PER CENT, RENDERING THE STRETCHED THREAD RESISTANT TO COLD WATER BY TREATMENT WITH AN AQUEOUS BATH CONTAINING CHLORAL AND DRYING THE THUS HARDENED THREAD, THE ENTIRE PROCESS BEING EFFECTED IN THE ABSENCE OF FORMALDEHYDE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-12 | 1954-08-14 | 1955-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-12 | 1958-08-14 | 1959-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-12 | 1962-08-14 | 1963-02-13 | $7700.00 | Window Closed / Lapsed |