US2875473A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of forming solid particulate hydroxyethoxycellulose
Assignee: Rayonier Inc
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Filing: 1955-08-10
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Granted: 1959-03-03
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Expires: 1975-08-10
Abstract
No abstract record available.
Inventors
- 👤 Mitchell Reid Logan
- 👤 Bampton Robert Friedrich
- 👤 Wadman William Hughes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:09
CPC Classifications
C; C08; C08B; C08B11/00; C08B11/02; C08B11/04; C08B11/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
THE PROCESS OF FORMING SOLID PARTICULATE HYDROXYETHYLCELLULOSE WHICH COMPRISES DIRECTING A STREAM OF AN AQUEOUS ALKALINE SOLUTION OF HYDROXYETHYLCELLULOSE CONTAINING FROM 2% TO 8% OF SUBSTITUTED ETHYLENE OXIDE THROUGH A NOZZLE IN THE RESTRICTED ZONE OF A VENTURI TUBE AND INTO A SURROUNDING STREAM OF HOT WATER MOVING IN THE SAME DIRECTION IN SAID TUBE THEREBY PREVENTING THE HYDROXYETHYLCELLULOSE FROM CONTACTING AND STICKING TO THE TUBE, CAUSING REMOVAL OF SODIUM HYDROXIDE FROM THE HYDROXYETHYLCELLULOSE IN THE WATER OF SAID RESTRICTED ZONE, PRECIPITATING GELATINOUS HYDROXYETHYLCELLULOSE IN AN ENLARGED ZONE OF SAID TUBE WHICH SEPATATES INTO PARTICLES, AND THEREAFTER SEPARATING AND DRYING THE PARTICLES OF HYDROXYETHYLCELLULOSE.
Claim 2
Dependent Claim
104 words
THE PROCESS OF FORMING SOLID PARTICULATE HYDROXYETHYLCELLULOSE WHICH COMPRISES DIRECTING A STREAM OF AN AQUEOUS ALKALINE SOLUTION OF HYDROXYETHYLCELLULOSE CONTAINING FROM 2% TO 8% OF SUBSTITUTED ETHYLENE OXIDE THROUGH A NOZZLE IN THE RESTRICTED ZONE OF A VENTURI TUBE AND INTO A SURROUNDING STREAM OF HOT WATER MOVING IN THE SAME DIRECTION IN SAID TUBE THEREBY PREVENTING THE HYDROXYETHYLCELLULOSE FROM CONTACTING AND STICKING TO THE TUBE, CAUSING REMOVAL OF SODIUM HYDROXIDE FROM THE HYDROXYETHYLCELLULOSE IN THE WATER OF SAID RESTRICTED ZONE, PRECIPITATING GELATINOUS HYDROXYETHYLCELLULOSE IN AN ENLARGED ZONE OF SAID TUBE WHICH SEPATATES INTO PARTICLES, AND THEREAFTER SEPARATING AND DRYING THE PARTICLES OF HYDROXYETHYLCELLULOSE.
References Cited (Backward Citations)
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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) | 1962-03-02 | 1962-09-01 | 1963-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-02 | 1966-09-01 | 1967-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-02 | 1970-09-01 | 1971-03-03 | $7700.00 | Window Closed / Lapsed |