Patent US2300886A successfully refreshed from Google Patents.
US3087775A
Expired / Lapsed
US
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Production of alkali-soluble cellulosic textile materials by the nitric acid treatment of partially etherified cottons
Assignee: Individual
•
Filing: 1960-06-01
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Granted: 1963-04-30
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Expires: 1980-06-01
Abstract
No abstract record available.
Inventors
- 👤 Robert M Reinhardt
- 👤 Terrence W Fenner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:23
CPC Classifications
C; C08; C08B; C08B11/00; C08B11/02; C08B11/04; C08B11/20; Y; Y10; Y10S; Y10S8/00; Y10S8/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
A PROCESS FOR PRODUCING AN AQUEOUS ALKALI SOLUBLE COTTON CELLULOSIC TEXTILE MATERIAL WHICH COMPRISES PARTIALLY ETHERIFYING THE COTTON CELLULOSE TEXTILE MATERIL TO A DEGREE OF SUBSTITUTION OF FROM ABOUT 0.01 TO ABOUT 0.6 AND OXIDIZING THE CELLULOSE CHAIN OF THE PARTIALLY ETHERIFIED TEXTILE MATERIAL BY TREATING THE PARTIALLY ETHERIFIED COTTON CELLULOSIC TEXTILE MATERIAL WITH AN AQUEOUS SOLUTION OF NITRIC ACID IN A CONCENTRATION OF FROM ABOUT 10% TO ABOUT 70% BY WEIGHT, AT A TEMPERATURE OF FROM ABOUT ROOM TEMPERATURE TO THAT THE BOILING POINT OF THE AQUEOUS NITRIC ACID SOLUTION, FOR A PERIOD OF TIME OF FROM ABOUT 0.5 MINUTE TO ABOUT 75 MINUTES, THE TIME AND TEMPERATURE OF THE NITRIC ACID TREATMENT BEING INVERSELY RELATED TO THE NITRIC ACID CONCENTRATION
Claim 2
Dependent Claim
122 words
A PROCESS FOR PRODUCING AN AQUEOUS ALKALI SOLUBLE COTTON CELLULOSIC TEXTILE MATERIAL WHICH COMPRISES PARTIALLY ETHERIFYING THE COTTON CELLULOSE TEXTILE MATERIL TO A DEGREE OF SUBSTITUTION OF FROM ABOUT 0.01 TO ABOUT 0.6 AND OXIDIZING THE CELLULOSE CHAIN OF THE PARTIALLY ETHERIFIED TEXTILE MATERIAL BY TREATING THE PARTIALLY ETHERIFIED COTTON CELLULOSIC TEXTILE MATERIAL WITH AN AQUEOUS SOLUTION OF NITRIC ACID IN A CONCENTRATION OF FROM ABOUT 10% TO ABOUT 70% BY WEIGHT, AT A TEMPERATURE OF FROM ABOUT ROOM TEMPERATURE TO THAT THE BOILING POINT OF THE AQUEOUS NITRIC ACID SOLUTION, FOR A PERIOD OF TIME OF FROM ABOUT 0.5 MINUTE TO ABOUT 75 MINUTES, THE TIME AND TEMPERATURE OF THE NITRIC ACID TREATMENT BEING INVERSELY RELATED TO THE NITRIC ACID CONCENTRATION
References Cited (Backward Citations)
US2461632A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-04-29 | 1966-10-29 | 1967-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-29 | 1970-10-29 | 1971-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-29 | 1974-10-29 | 1975-04-30 | $7700.00 | Window Closed / Lapsed |