US2829944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of extruding an aqueous particulate dispersion of finely divided cellulose
Assignee: EIDP Inc
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Filing: 1955-11-14
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Granted: 1958-04-08
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Expires: 1975-11-14
Abstract
No abstract record available.
Inventors
- 👤 Houtz Ray Clyde
- 👤 Werntz James Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:30
CPC Classifications
D; D01; D01F; D01F2/00; D01D; D01D5/00; D01D5/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
THE PROCESS WHICH COMPRISES THE STEPS OF EXTRUDING THROUGH A DIE TO FORM A SHAPED ARTICLE AN AQUEOUS PARTICULATE DISPERSION OF FINELY-DIVIDED NATURAL POLYMER COMPRISING AT LEAST 60% OF CELLULOSE AND HAVING AN AVERAGE PARTICLE SIZE OF LESS THAN 300 MICRONS IN DIAMETER, SAID DISPERSION CONTAINING A WATER-SOLUBLE, POLYMERIC FILMFORMING MATERIAL, COALESCING SAID CELLULOSE PARTICLES BY CONTACTING SAID SHAPED ARTICLE WITH A SOLVENT SALT SOLUTION CAPABLE OF DISSOLVING SAID NATURAL POLYMER, REMOVING SAID ARTICLE FROM SAID SALT SOLUTION AFTER THE CELLULOSE PARTICLES ARE SUBSTANTIALLY COALESCED AND BEFORE SAID ARTICLE LOSES ITS SHAPE, AND WASHING SAID ARTICLE FREE OF SAID SALT.
Claim 2
Dependent Claim
100 words
THE PROCESS WHICH COMPRISES THE STEPS OF EXTRUDING THROUGH A DIE TO FORM A SHAPED ARTICLE AN AQUEOUS PARTICULATE DISPERSION OF FINELY-DIVIDED NATURAL POLYMER COMPRISING AT LEAST 60% OF CELLULOSE AND HAVING AN AVERAGE PARTICLE SIZE OF LESS THAN 300 MICRONS IN DIAMETER, SAID DISPERSION CONTAINING A WATER-SOLUBLE, POLYMERIC FILMFORMING MATERIAL, COALESCING SAID CELLULOSE PARTICLES BY CONTACTING SAID SHAPED ARTICLE WITH A SOLVENT SALT SOLUTION CAPABLE OF DISSOLVING SAID NATURAL POLYMER, REMOVING SAID ARTICLE FROM SAID SALT SOLUTION AFTER THE CELLULOSE PARTICLES ARE SUBSTANTIALLY COALESCED AND BEFORE SAID ARTICLE LOSES ITS SHAPE, AND WASHING SAID ARTICLE FREE OF SAID SALT.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-07 | 1961-10-07 | 1962-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-07 | 1965-10-07 | 1966-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-07 | 1969-10-07 | 1970-04-08 | $7700.00 | Window Closed / Lapsed |