US2647064A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of improving the cold-water solubility of a fibrous cellulose ether
Assignee: Dow Chemical Co
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Filing: 1949-11-25
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Granted: 1953-07-28
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Expires: 1969-11-25
Abstract
No abstract record available.
Inventors
- 👤 Arthur W Anderson
- 👤 Bernhard V Moeller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:50
CPC Classifications
C; C08; C08B; C08B11/00; C08B11/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
A METHOD OF TREATING A FIBROUS COLD-WATERSOLUBLE CELLULOSE ETHER, WHICH NORMALLY GELS IN HOT WATER, TO IMPROVE ITS RATE OF SOLUTION IN COLD WATER WHICH COMPRISES COMPLETELY WETTING THE FIBROUS CELLULOSE ETHER, WITHOUT DISSOLVING IT, AT A TEMPERATURE ABOVE THE GEL FORMATION TEMPERATURE OF SAID ETHER, WITH AN AQUEOUS SOLUTION OF FROM 0.01 TO 1 PER CENT BY WEIGHT OF A SURFACE ACTIVE AGENT SELECTED FROM GROUP CONSISTING OF POLYETHYLENE GLYCOL MONO-ETHER OF SORBITAN MONOLAURATE AND POLYOXYETHYLENE MONO-LAURYL ETHER, AND DRYING THE WET ETHER, CONTAINING AN AMOUNT OF THE TREATING SOLUTION WHICH HOLDS FROM 0.01 TO 1 PER CENT OF THE SURFACE ACTIVE AGENT, BASED ON THE WEIGHT OF CELLULOSE ETHER, AT A TEMPERATURE ABOVE THE GEL FORMATION TEMPERATURE OF SAID ETHER.
Claim 2
Independent Claim
122 words
A METHOD OF TREATING A FIBROUS COLD-WATERSOLUBLE CELLULOSE ETHER, WHICH NORMALLY GELS IN HOT WATER, TO IMPROVE ITS RATE OF SOLUTION IN COLD WATER WHICH COMPRISES COMPLETELY WETTING THE FIBROUS CELLULOSE ETHER, WITHOUT DISSOLVING IT, AT A TEMPERATURE ABOVE THE GEL FORMATION TEMPERATURE OF SAID ETHER, WITH AN AQUEOUS SOLUTION OF FROM 0.01 TO 1 PER CENT BY WEIGHT OF A SURFACE ACTIVE AGENT SELECTED FROM GROUP CONSISTING OF POLYETHYLENE GLYCOL MONO-ETHER OF SORBITAN MONOLAURATE AND POLYOXYETHYLENE MONO-LAURYL ETHER, AND DRYING THE WET ETHER, CONTAINING AN AMOUNT OF THE TREATING SOLUTION WHICH HOLDS FROM 0.01 TO 1 PER CENT OF THE SURFACE ACTIVE AGENT, BASED ON THE WEIGHT OF CELLULOSE ETHER, AT A TEMPERATURE ABOVE THE GEL FORMATION TEMPERATURE OF SAID ETHER.
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) | 1956-07-27 | 1957-01-26 | 1957-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-27 | 1961-01-26 | 1961-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-27 | 1965-01-26 | 1965-07-28 | $7700.00 | Window Closed / Lapsed |