Patent US2737437A successfully refreshed from Google Patents.
US2737437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of shaped cellulose articles
Assignee: EIDP Inc
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Filing: 1953-02-16
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Granted: 1956-03-06
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Expires: 1973-02-16
Abstract
No abstract record available.
Inventors
- 👤 Bechtold Max Fredrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:57
CPC Classifications
D; D01; D01F; D01F2/00; D01F2/06; D01F2/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
PROCESS OF PREPARING SHAPED CELLULOSE ARTICLES WHICH COMPRISES DISPERSING CELLULOSE OF AVERAGE PARTICLE SIZE RANGING FROM 0.1 TO 300 MICRONS IN AN AQUEOUS SOLUTION OF A SOLVENT METAL SALT, SAID SALT BEING PRESENT IN SAID SOLUTION IN AN AMOUNT AT LEAST EQUAL TO THE WEIGHT OF SAID CELLULOSE BUT THE CONCENTRATION OF SAID SOLUTION BEING LESS THAN THE MINIMUM CONCENTRATION AT WHICH SAID CELLULOSE WILL DISSOLVE, FORMING THE RESULTING PARTICULATE CELLULOSE DISPERSION INTO A SHAPED ARTICLE AT SUBSTANTIALLY ATMOSPHERIC PRESSURE, EVAPORATING WATER FROM SAID SHAPED ARTICLE AT A TEMPERATURE OF AT LEAST 75*C. UNTIL SAID CELLULOSE PARTICLES COALESCE, AND THEREAFTER WASHING SAID SHAPED ARTICLE FREE OF SAID SALT.
Claim 2
Dependent Claim
108 words
PROCESS OF PREPARING SHAPED CELLULOSE ARTICLES WHICH COMPRISES DISPERSING CELLULOSE OF AVERAGE PARTICLE SIZE RANGING FROM 0.1 TO 300 MICRONS IN AN AQUEOUS SOLUTION OF A SOLVENT METAL SALT, SAID SALT BEING PRESENT IN SAID SOLUTION IN AN AMOUNT AT LEAST EQUAL TO THE WEIGHT OF SAID CELLULOSE BUT THE CONCENTRATION OF SAID SOLUTION BEING LESS THAN THE MINIMUM CONCENTRATION AT WHICH SAID CELLULOSE WILL DISSOLVE, FORMING THE RESULTING PARTICULATE CELLULOSE DISPERSION INTO A SHAPED ARTICLE AT SUBSTANTIALLY ATMOSPHERIC PRESSURE, EVAPORATING WATER FROM SAID SHAPED ARTICLE AT A TEMPERATURE OF AT LEAST 75*C. UNTIL SAID CELLULOSE PARTICLES COALESCE, AND THEREAFTER WASHING SAID SHAPED ARTICLE FREE OF SAID SALT.
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) | 1959-03-06 | 1959-09-05 | 1960-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-06 | 1963-09-05 | 1964-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-06 | 1967-09-05 | 1968-03-06 | $7700.00 | Window Closed / Lapsed |