Patent US3659129A successfully refreshed from Google Patents.
US3001884A
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US
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Mixtures of cellulose ethers and starch ethers
Assignee: Kunstzijdespinnerij Nyma NV
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Filing: 1958-11-12
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Granted: 1961-09-26
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Expires: 1978-11-12
Abstract
No abstract record available.
Inventors
- 👤 Gerard J J Nijhoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:04
CPC Classifications
C; C08; C08L; C08L1/00; C08L1/08; C08L1/26; C08B; C08B31/00; C08B31/08; C08L1/28; C08L1/286
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
A SIZING COMPOSITION CONSISTING ESSENTIALLY OF A SOLUTION IN WATER OF A MIXTURE OF CARBOXYMETHYL CELLULOSE AND FROM 0.1 TO 20 PARTS BY WEIGHT, BASED ON THE CARBOXYMETHYL CELLULOSE, OF CARBOXYMETHYL STARCH PREPARED BY MIXING ALKALI CELLULOSE WITH AN AMOUNT OF AN ETHERIFYING REAGENT SELECTED FROM THE GROUP CONSISTING OF CHLORACETIC ACID AND SODIUM CHLORACETATE, SAID AMOUNT BEING AT LEAST SUBSTANTIALLY EQUIVALENT OF THE ALKALI OF SAID ALKALI CELLULOSE, REACTING SAID ETHERIFYING REAGENT WITH SAID ALKALI CELLULOSE UNTIL SAID ALKALI IS SUBSTANTIALLY CONSUMED, WHEREBY A REACTION MIXTURE CONTAINING A CELLULOSE ETHERIS FORMED, PROVIDING AN UNREACTED AMOUNT OF SAID ETHERIFYING REAGENT IN SAID REACTION MIXTURE, ADDING STARCH TO SAID REACTION MIXTURE, AND REACTING SAID STARCH WITH THE UNREACTED ETHERIFYING REAGENT IN SAID MIXTURE TO FORM A STARCH ETHER.
Claim 2
Dependent Claim
127 words
A SIZING COMPOSITION CONSISTING ESSENTIALLY OF A SOLUTION IN WATER OF A MIXTURE OF CARBOXYMETHYL CELLULOSE AND FROM 0.1 TO 20 PARTS BY WEIGHT, BASED ON THE CARBOXYMETHYL CELLULOSE, OF CARBOXYMETHYL STARCH PREPARED BY MIXING ALKALI CELLULOSE WITH AN AMOUNT OF AN ETHERIFYING REAGENT SELECTED FROM THE GROUP CONSISTING OF CHLORACETIC ACID AND SODIUM CHLORACETATE, SAID AMOUNT BEING AT LEAST SUBSTANTIALLY EQUIVALENT OF THE ALKALI OF SAID ALKALI CELLULOSE, REACTING SAID ETHERIFYING REAGENT WITH SAID ALKALI CELLULOSE UNTIL SAID ALKALI IS SUBSTANTIALLY CONSUMED, WHEREBY A REACTION MIXTURE CONTAINING A CELLULOSE ETHERIS FORMED, PROVIDING AN UNREACTED AMOUNT OF SAID ETHERIFYING REAGENT IN SAID REACTION MIXTURE, ADDING STARCH TO SAID REACTION MIXTURE, AND REACTING SAID STARCH WITH THE UNREACTED ETHERIFYING REAGENT IN SAID MIXTURE TO FORM A STARCH ETHER.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-25 | 1965-03-27 | 1965-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-25 | 1969-03-27 | 1969-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-25 | 1973-03-27 | 1973-09-26 | $7700.00 | Window Closed / Lapsed |