US2976274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing a high viscosity water-soluble gum product
Assignee: Kelco Co
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Filing: 1958-02-21
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Granted: 1961-03-21
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Expires: 1978-02-21
Abstract
No abstract record available.
Inventors
- 👤 William H Mcneely
- 👤 Orville G Lowe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:15
CPC Classifications
C; C08; C08B; C08B37/00; C08B37/006; C08B37/0087
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
A METHOD OF PREPARING A WATER SOLUBLE PRODUCT SUITABLE FOR INCREASING THE VISCOSITY OF AN AQUEOUS SOLUTION COMPRISING: ADMIXING AT LEAST ONE OF THE MEMBERS SELECTED FROM THE GROUP CONSISTING OF GUM ARABIC, DEXTRAN AND CORN FIBER GUM WITH A BASE SELECTED FROM THE GROUP CONSISTING OF SODIUM HYDROXIDE AND POTASSIUM HYDROXIDE IN AN AMOUNT FROM 1% TO 20% BY WEIGHT OF SAID MEMBERS, AND A BI-FUNCTIONAL ETHERIFYING AGENT IN AN AMOUNT OF FROM 1% TO 15% OF THE AFORESAID MEMBERS SELECTED FROM THE GROUP CONSISTING OF EPIHALOHYDRINS, ALKYL SUBSTITUTED EPIHALOHYDRINS AND GLYCEROL DIHALOHYDRINS, HEATING SAID MIXTURE AT A LOW TEMPERATURE UNTIL THE CATION OF THE BASE FORMS A SALT, ADDING AN ACID TO NEUTRALIZE THE SOLUTION, ADDING THE SOLUTION TO WATER-MISCRIBLE ORGANIC SOLVENT TO FORM A GUM PRECIPITATE, REMOVING SAID SOLVENT, AND DRYING AND HEATING SAID PRECIPITATE.
Claim 2
Independent Claim
138 words
A METHOD OF PREPARING A WATER SOLUBLE PRODUCT SUITABLE FOR INCREASING THE VISCOSITY OF AN AQUEOUS SOLUTION COMPRISING: ADMIXING AT LEAST ONE OF THE MEMBERS SELECTED FROM THE GROUP CONSISTING OF GUM ARABIC, DEXTRAN AND CORN FIBER GUM WITH A BASE SELECTED FROM THE GROUP CONSISTING OF SODIUM HYDROXIDE AND POTASSIUM HYDROXIDE IN AN AMOUNT FROM 1% TO 20% BY WEIGHT OF SAID MEMBERS, AND A BI-FUNCTIONAL ETHERIFYING AGENT IN AN AMOUNT OF FROM 1% TO 15% OF THE AFORESAID MEMBERS SELECTED FROM THE GROUP CONSISTING OF EPIHALOHYDRINS, ALKYL SUBSTITUTED EPIHALOHYDRINS AND GLYCEROL DIHALOHYDRINS, HEATING SAID MIXTURE AT A LOW TEMPERATURE UNTIL THE CATION OF THE BASE FORMS A SALT, ADDING AN ACID TO NEUTRALIZE THE SOLUTION, ADDING THE SOLUTION TO WATER-MISCRIBLE ORGANIC SOLVENT TO FORM A GUM PRECIPITATE, REMOVING SAID SOLVENT, AND DRYING AND HEATING SAID PRECIPITATE.
References Cited (Backward Citations)
US2650917A
Cited
US2496670A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-20 | 1964-09-19 | 1965-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-20 | 1968-09-19 | 1969-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-20 | 1972-09-19 | 1973-03-21 | $7700.00 | Window Closed / Lapsed |