US2855321A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Viscose process
Assignee: EIDP Inc
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Filing: 1955-03-30
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Granted: 1958-10-07
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Expires: 1975-03-30
Abstract
No abstract record available.
Inventors
- 👤 Bachlott Donald Douglas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:15
CPC Classifications
D; D01; D01F; D01F2/00; D01F2/06; D01F2/08; D01F2/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
THE PROCESS FOR PREPARING A MONOAMINE-MODIFIED VISCOSE SPINNING SOLUTION WHICH COMPRISES THE STEPS OF PARTIALLY XANTHATING ALKALI CELLULOSE WITH CARBON DISULFIDE IN A DRY PHASE SO THAT UP TO 90% OF THE TOTAL ZANTHATION COMTEMPLATED OCCURS; MIXING THE PARTIALLY XANTHATED ALKALI CELLULOSE WITH AQUEOUS SODIUM HYDROXIDE SOLUTION TO A CELLULOSE CONTENT OF 4% TO 10% AND A CAUSTIC CONTENT OF 4% AND 8%; ADDING CARBON DISULFIDE AND A TERTIARY MONOAMINE MODIFIER, SAID MODIFIER HAVING A MAXIMUM OF EIGHT CARBON ATOMS IN ANY ONE RADICAL, HAVING AT LEAST ONE ALIPHATIC RADICAL WITH A HYDROXYL GROUP ATTACHED TO A CARBON ATOMS, AND BEING SOLUBLE TO THE EXTENT OF AT LEAST 0.1% IN 6% CAUSTIC SODA SOLUTION; AND COMPLETING THE XANTHATION TO FORM A VISCOSE SOLUTION HAVING A CONTENT OF 0.02 TO 1 MILLIMOL OF MONOAMINE PER 100 GRAMS OF VISCOSE.
Claim 2
Dependent Claim
138 words
THE PROCESS FOR PREPARING A MONOAMINE-MODIFIED VISCOSE SPINNING SOLUTION WHICH COMPRISES THE STEPS OF PARTIALLY XANTHATING ALKALI CELLULOSE WITH CARBON DISULFIDE IN A DRY PHASE SO THAT UP TO 90% OF THE TOTAL ZANTHATION COMTEMPLATED OCCURS; MIXING THE PARTIALLY XANTHATED ALKALI CELLULOSE WITH AQUEOUS SODIUM HYDROXIDE SOLUTION TO A CELLULOSE CONTENT OF 4% TO 10% AND A CAUSTIC CONTENT OF 4% AND 8%; ADDING CARBON DISULFIDE AND A TERTIARY MONOAMINE MODIFIER, SAID MODIFIER HAVING A MAXIMUM OF EIGHT CARBON ATOMS IN ANY ONE RADICAL, HAVING AT LEAST ONE ALIPHATIC RADICAL WITH A HYDROXYL GROUP ATTACHED TO A CARBON ATOMS, AND BEING SOLUBLE TO THE EXTENT OF AT LEAST 0.1% IN 6% CAUSTIC SODA SOLUTION; AND COMPLETING THE XANTHATION TO FORM A VISCOSE SOLUTION HAVING A CONTENT OF 0.02 TO 1 MILLIMOL OF MONOAMINE PER 100 GRAMS OF VISCOSE.
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) | 1961-10-06 | 1962-04-07 | 1962-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-06 | 1966-04-07 | 1966-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-06 | 1970-04-07 | 1970-10-07 | $7700.00 | Window Closed / Lapsed |