US2810162A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing shaped articles of cellulose
Assignee: EIDP Inc
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Filing: 1953-06-11
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Granted: 1957-10-22
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Expires: 1973-06-11
Abstract
No abstract record available.
Inventors
- 👤 Bechtold Max Fredrick
- 👤 Werntz James Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:43
CPC Classifications
D; D01; D01F; D01F2/00; D01F2/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
THE PROCESS FOR PREPARING A SHAPED CELLULOSE ARTICLE WHICH COMPRISES SHAPING THE ARTICLE FROM AN AQUEOUS PARTICULATE DISPERSION ESSENTIALLY CONSISTING OF 1 TO 7 PARTS OF FINELY DIVIDED CELLULOSE, HAVING AN AVERAGE PARTICLE SIZE OF LESS THAN 300 MICRONS IN DIAMETER AND A DP VALUE OF AT LEAST 150, DISPERSED IN 19 TO 13 PARTS OF WATER CONTAINING 0% TO 20%, BY WEIGHT OF THE CELLULOSE, OF A MONOMERIC DISPERSING AGENT DISSOLVED THEREIN, COALESCING THE SHAPED CELLULOSE-IN-WATER DISPERSION BY CONTACT WITH A CONCENTRATED SOLUTION OF A METAL SALT AT A TEMPERATURE OF 90* TO 150*C. CAPABLE OF DISSOLVING SAID CELLULOSE UNTIL THE CELLULOSE PARTICLES ARE SUBSTANTIALLY COALESCED AND THE DISPERSION IS CONVERTED TO A GEL, SAID COALESCING TREATMENT BEING DISCONTINUED BEFORE SAID ARTICLE LOSES ITS SHAPE, WASHING THE SHAPED ARTICLE FREE OF SALT, AND THEREAFTER DRYING THE ARTICLE SO PRODUCED.
Claim 2
Dependent Claim
140 words
THE PROCESS FOR PREPARING A SHAPED CELLULOSE ARTICLE WHICH COMPRISES SHAPING THE ARTICLE FROM AN AQUEOUS PARTICULATE DISPERSION ESSENTIALLY CONSISTING OF 1 TO 7 PARTS OF FINELY DIVIDED CELLULOSE, HAVING AN AVERAGE PARTICLE SIZE OF LESS THAN 300 MICRONS IN DIAMETER AND A DP VALUE OF AT LEAST 150, DISPERSED IN 19 TO 13 PARTS OF WATER CONTAINING 0% TO 20%, BY WEIGHT OF THE CELLULOSE, OF A MONOMERIC DISPERSING AGENT DISSOLVED THEREIN, COALESCING THE SHAPED CELLULOSE-IN-WATER DISPERSION BY CONTACT WITH A CONCENTRATED SOLUTION OF A METAL SALT AT A TEMPERATURE OF 90* TO 150*C. CAPABLE OF DISSOLVING SAID CELLULOSE UNTIL THE CELLULOSE PARTICLES ARE SUBSTANTIALLY COALESCED AND THE DISPERSION IS CONVERTED TO A GEL, SAID COALESCING TREATMENT BEING DISCONTINUED BEFORE SAID ARTICLE LOSES ITS SHAPE, WASHING THE SHAPED ARTICLE FREE OF SALT, AND THEREAFTER DRYING THE ARTICLE SO PRODUCED.
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) | 1960-10-21 | 1961-04-22 | 1961-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-21 | 1965-04-22 | 1965-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-21 | 1969-04-22 | 1969-10-22 | $7700.00 | Window Closed / Lapsed |