US2860946A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cyanoethylation process
Assignee: Monsanto Chemicals Ltd
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Filing: 1955-08-15
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Granted: 1958-11-18
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Expires: 1975-08-15
Abstract
No abstract record available.
Inventors
- 👤 Salem F Belt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:16
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/322; D06M13/345; D06M13/348; Y; Y10; Y10S; Y10S8/00; Y10S8/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A CONTINUOUS PROCESS FOR CYANOETHYLATING CELLULOSE WHICH COMPRISES THE STEPS OF CONTINUOUSLY IMPREGNATING THE CELLULOSE WITH AN AQUEOUS SOLUTION OF A STRONGLY ALKALINE HYDROXIDE, CONTINUOUSLY SUBJECTING SAID ALKALI-IMPREGNATED CELLULOSE TO CONTACT WITH VAPORS OF ACRYLONITRILE IN A SUITABLE APPARATUS MAINTAINED AT A TEMPERATUER FROM ABOUT 70 TO ABOUT 80* C. WHILE CONTINUOUSLY WITHDRAWING AND REMOVING FROM SAID APPARATUS AN AZEOTROPIC MIXTURE FORMED FROM THE ACRYLONITRILE THEREIN AND THE WATER PRESENT IN SAID CELLULOSE, AND THEREAFTER WASHING AND DRYING THE CYANOETHYLATED CELLULOSE.
Claim 2
Dependent Claim
81 words
A CONTINUOUS PROCESS FOR CYANOETHYLATING CELLULOSE WHICH COMPRISES THE STEPS OF CONTINUOUSLY IMPREGNATING THE CELLULOSE WITH AN AQUEOUS SOLUTION OF A STRONGLY ALKALINE HYDROXIDE, CONTINUOUSLY SUBJECTING SAID ALKALI-IMPREGNATED CELLULOSE TO CONTACT WITH VAPORS OF ACRYLONITRILE IN A SUITABLE APPARATUS MAINTAINED AT A TEMPERATUER FROM ABOUT 70 TO ABOUT 80* C. WHILE CONTINUOUSLY WITHDRAWING AND REMOVING FROM SAID APPARATUS AN AZEOTROPIC MIXTURE FORMED FROM THE ACRYLONITRILE THEREIN AND THE WATER PRESENT IN SAID CELLULOSE, AND THEREAFTER WASHING AND DRYING THE CYANOETHYLATED CELLULOSE.
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) | 1961-11-17 | 1962-05-19 | 1962-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-17 | 1966-05-19 | 1966-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-17 | 1970-05-19 | 1970-11-18 | $7700.00 | Window Closed / Lapsed |