US3089749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of artificial threads
Assignee: Akzo Nobel UK PLC
•
Filing: 1961-12-01
•
Granted: 1963-05-14
•
Expires: 1981-12-01
Abstract
No abstract record available.
Inventors
- 👤 Denis G H Ballard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:50
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/08; C08G69/10; D; D01; D01F; D01F6/00; D01F6/58; D01F6/68
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
A PROCESS FOR THE MANUFACTURE OF FIBRES COMPOSED OF POLYMERS CONSISTING ESSENTIALLY OF UNITS OF AN OPTICALLY ACTIVE FORM OF A GLUTAMIC ESTER CHOSEN FROM THE GROUP CONSISTING OF GAMNA-METHYL-GLUTAMATE AND GAMMA-ETHYLGLUTAMATE WHICH COMPRISES POLYMERISING AN OPTICALLY ACTIVE N-CARBOXY ANHYDRIDES CHOSEN FROM THE GROUP CONSISTING OF THE N-CARBOXY ANHYDRIDES OF GAMMA-METHYL-GLUTAMATE AND GAMMA-ETHYL-GLUTAMATE IN AN ORGANIC LIQUID MEDIUM WHICH IS A SOLVENT FOR THE POLYEPTIDE WHILE IT IS STILL THE POLYPEPTIDE IS IN THE A CONFIGURTION ON EXTRUSION, AND BY WEIGHT OF UNITS OF THE OPITCALLY ACTIVE GLUTAMIC ESTER EXTRUDING A SOLUTION STATE INTO A SETTING MEDIUM SO THAT THE IN THE SOLVATED STATE INTO A SETTING MEDIUM SO THAT THE POLYPEPTIDE IS IN THE A CONFIGURATION ON EXTRUSION, AND STETCHING THE RESULANT THREADS THEREBY CONVERTING THE POLYPETIDE SUBSTANTILLY INTO THE B CONFIGURATION AND SUBSTANTILLY ORIENTING THE FIBRE ALONG ITS AXIS.
Claim 2
Dependent Claim
141 words
A PROCESS FOR THE MANUFACTURE OF FIBRES COMPOSED OF POLYMERS CONSISTING ESSENTIALLY OF UNITS OF AN OPTICALLY ACTIVE FORM OF A GLUTAMIC ESTER CHOSEN FROM THE GROUP CONSISTING OF GAMNA-METHYL-GLUTAMATE AND GAMMA-ETHYLGLUTAMATE WHICH COMPRISES POLYMERISING AN OPTICALLY ACTIVE N-CARBOXY ANHYDRIDES CHOSEN FROM THE GROUP CONSISTING OF THE N-CARBOXY ANHYDRIDES OF GAMMA-METHYL-GLUTAMATE AND GAMMA-ETHYL-GLUTAMATE IN AN ORGANIC LIQUID MEDIUM WHICH IS A SOLVENT FOR THE POLYEPTIDE WHILE IT IS STILL THE POLYPEPTIDE IS IN THE A CONFIGURTION ON EXTRUSION, AND BY WEIGHT OF UNITS OF THE OPITCALLY ACTIVE GLUTAMIC ESTER EXTRUDING A SOLUTION STATE INTO A SETTING MEDIUM SO THAT THE IN THE SOLVATED STATE INTO A SETTING MEDIUM SO THAT THE POLYPEPTIDE IS IN THE A CONFIGURATION ON EXTRUSION, AND STETCHING THE RESULANT THREADS THEREBY CONVERTING THE POLYPETIDE SUBSTANTILLY INTO THE B CONFIGURATION AND SUBSTANTILLY ORIENTING THE FIBRE ALONG ITS AXIS.
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) | 1966-05-13 | 1966-11-12 | 1967-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-13 | 1970-11-12 | 1971-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-13 | 1974-11-12 | 1975-05-14 | $7700.00 | Window Closed / Lapsed |