US2824779A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbamoylethyl, carboxyethyl, and aminoethyl cellulose ether textile fibers and process of making the same
Assignee: Individual
•
Filing: 1955-03-09
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Granted: 1958-02-25
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Expires: 1975-03-09
Abstract
No abstract record available.
Inventors
- 👤 Wilson A Reeves
- 👤 John D Guthrie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:49
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/322; D06M13/402; D06M13/41; C; C08; C08B; C08B11/00; C08B11/02; C08B11/04; C08B11/14; C08B11/15; Y; Y10; Y10S; Y10S8/00; Y10S8/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A PROCESS FOR CARBAMOYLETHYLATING CELLULOSIC TEXTILE FIBERS CONTAINING AT LEAST 1 FREE HYDROXYL GROUP PER 5 TO 6 ANHYDROGLUCOSE UNITS WHICH COMPRISES REACTING SAID FIBERS WITH ABOUT FROM 60 TO 150% OF THE WEIGHT OF THE FIBERS OF A SOLUTION COMPRISING 1-55.2% OF ACRYLAMIDE AND 1 TO 12 WEIGHT PERCENT OF A STRONG BASE FROM THE GROUP CONSISTING OF AN ALKALI METAL HYDROXIDE AND A QUATERNARY AMMONIUM HYDROXIDE UNTIL THERE IS INTRODUCED INTO THE CELLULOSE MOLEULES ABOUT FROM 1 CARBAMOYLETHYL GROUP PER 6 ANHYDROGLUCOSE UNITS TO 1 CARBAMOYLETHYL GROUP PER 2 ANHYDROGLUCOSE UNITS.
Claim 2
Dependent Claim
93 words
A PROCESS FOR CARBAMOYLETHYLATING CELLULOSIC TEXTILE FIBERS CONTAINING AT LEAST 1 FREE HYDROXYL GROUP PER 5 TO 6 ANHYDROGLUCOSE UNITS WHICH COMPRISES REACTING SAID FIBERS WITH ABOUT FROM 60 TO 150% OF THE WEIGHT OF THE FIBERS OF A SOLUTION COMPRISING 1-55.2% OF ACRYLAMIDE AND 1 TO 12 WEIGHT PERCENT OF A STRONG BASE FROM THE GROUP CONSISTING OF AN ALKALI METAL HYDROXIDE AND A QUATERNARY AMMONIUM HYDROXIDE UNTIL THERE IS INTRODUCED INTO THE CELLULOSE MOLEULES ABOUT FROM 1 CARBAMOYLETHYL GROUP PER 6 ANHYDROGLUCOSE UNITS TO 1 CARBAMOYLETHYL GROUP PER 2 ANHYDROGLUCOSE UNITS.
References Cited (Backward Citations)
US2338681A
Cited
US2618633A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-24 | 1961-08-26 | 1962-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-24 | 1965-08-26 | 1966-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-24 | 1969-08-26 | 1970-02-25 | $7700.00 | Window Closed / Lapsed |