US2979374A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fibrous textile cellulosic phosphonomethyl ethers and process of preparation
Assignee: Individual
•
Filing: 1957-10-31
•
Granted: 1961-04-11
•
Expires: 1977-10-31
Abstract
No abstract record available.
Inventors
- 👤 Jr George L Drake
- 👤 Wilson A Reeves
- 👤 John D Guthrie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:47
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/244; D06M13/282; D06M13/288; D06M13/285
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
117 words
A PROCESS FOR PREPARING CHEMICALLY MODIFIED FIBROUS CELLULOSIC TEXTILE MATERIAL CONTAINING FROM ABOUT 0.02% TO ABOUT 5.0% PHOSPHORUS IN THE FORM OF PHOSPHONOMETHYL ETHER OF CELLULOSE COMPRISING: PADDING A FIBROUS CELLULOSE TEXTILE MATERIAL HAVING AT LEAST ONE FREE HYDROXYL GROUP PER ANHYDROGLUCOSE UNIT OF THE CELLULOSE MOLECULE WITH AN AQUEOUS SOLUTION CONTAINING FROM 5 TO 20% BY WEIGHT OF AN ALKALI METAL SALT OF CHLOROMETHYL PHOSPHONIC ACID AND 15 TO 25% BY WEIGHT OF AN ALKALI METAL HYDROXIDE TO A WET PICKUP OF FROM 125 TO 200%, HEATING THE PADDED FIBROUS CELLULOSIC TEXTILER MATERIAL FOR FROM 5 TO 30 MINUTES AT TEMPERATURES OF FROM 16 TO 140*C., THE HIGHER TEMPERATURES BEING USED WITH THE SHORTER HEATING TIMES.
Claim 2
Dependent Claim
117 words
A PROCESS FOR PREPARING CHEMICALLY MODIFIED FIBROUS CELLULOSIC TEXTILE MATERIAL CONTAINING FROM ABOUT 0.02% TO ABOUT 5.0% PHOSPHORUS IN THE FORM OF PHOSPHONOMETHYL ETHER OF CELLULOSE COMPRISING: PADDING A FIBROUS CELLULOSE TEXTILE MATERIAL HAVING AT LEAST ONE FREE HYDROXYL GROUP PER ANHYDROGLUCOSE UNIT OF THE CELLULOSE MOLECULE WITH AN AQUEOUS SOLUTION CONTAINING FROM 5 TO 20% BY WEIGHT OF AN ALKALI METAL SALT OF CHLOROMETHYL PHOSPHONIC ACID AND 15 TO 25% BY WEIGHT OF AN ALKALI METAL HYDROXIDE TO A WET PICKUP OF FROM 125 TO 200%, HEATING THE PADDED FIBROUS CELLULOSIC TEXTILER MATERIAL FOR FROM 5 TO 30 MINUTES AT TEMPERATURES OF FROM 16 TO 140*C., THE HIGHER TEMPERATURES BEING USED WITH THE SHORTER HEATING TIMES.
Claim 3
Dependent Claim
59 words
A CHEMICALLY MODIFIED CELLULOSIC TEXTILE IN WHICH SOME OF THE HYDROXYL GROUPS HAVE BEEN CONVERTED TO -OCH2PO3X2 GROUPS IN WHICH X IS A MEMBER OF THE GROUP CONSISTING OF HYDROGEN, ALKALI METAL, AND NH4, THE DEGREE OF CONVERSION BEING SUCH THAT THE MODIFIED CELLULOSIC TEXTILE CONTAINS FROM 0.01% TO 4.0% BY WEIGHT OF THE MODIFIED CELLULOSIC TEXTILE OF PHOSPHORUS.
Claim 4
Dependent Claim
59 words
A CHEMICALLY MODIFIED CELLULOSIC TEXTILE IN WHICH SOME OF THE HYDROXYL GROUPS HAVE BEEN CONVERTED TO -OCH2PO3X2 GROUPS IN WHICH X IS A MEMBER OF THE GROUP CONSISTING OF HYDROGEN, ALKALI METAL, AND NH4, THE DEGREE OF CONVERSION BEING SUCH THAT THE MODIFIED CELLULOSIC TEXTILE CONTAINS FROM 0.01% TO 4.0% BY WEIGHT OF THE MODIFIED CELLULOSIC TEXTILE OF PHOSPHORUS.
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) | 1964-04-10 | 1964-10-10 | 1965-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-10 | 1968-10-10 | 1969-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-10 | 1972-10-10 | 1973-04-11 | $7700.00 | Window Closed / Lapsed |