US2494911A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-stability glycol alginates and their manufacture
Assignee: Kelco Co
•
Filing: 1945-12-22
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Granted: 1950-01-17
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Expires: 1965-12-22
Abstract
No abstract record available.
Inventors
- 👤 Arnold B Steiner
- 👤 William H Mcneely
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:01
CPC Classifications
C; C08; C08B; C08B37/00; C08B37/006; C08B37/0084
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
A MODIFIED, FULLY WATER-SOLUBLE, SOLID GLYCOL ALGINATE IN WHICH FROM FIVE PERCENT TO THIRTY PERCENT OF THE CARBOXYL GROUPS OF ALGINIC ACID ARE COMBINED WITH A BASE, IN WHICH A PART NOT TO EXCEED TWENTY PERCENT OF THE CARBOXYL GROUPS ARE UNREACTED, AND IN WHICH THE REMAINDER OF THE CARBOXYL GROUPS ARE ESTERIFIED WITH AN ALKYLENE OXIDE, SAID GLYCOL ALGINATE BEING FURTHER CHARACTERIZED BY A HYDROGENION CONCENTRATION IN 1% AQUEOUS SOLUTION NOT SUBSTANTIALLY BELOW PH 3.5, AND YIELDING CLEAR, VISCOIUS COLLOIDAL AQUEOUS SOLUTIONS.
Claim 2
Dependent Claim
83 words
A MODIFIED, FULLY WATER-SOLUBLE, SOLID GLYCOL ALGINATE IN WHICH FROM FIVE PERCENT TO THIRTY PERCENT OF THE CARBOXYL GROUPS OF ALGINIC ACID ARE COMBINED WITH A BASE, IN WHICH A PART NOT TO EXCEED TWENTY PERCENT OF THE CARBOXYL GROUPS ARE UNREACTED, AND IN WHICH THE REMAINDER OF THE CARBOXYL GROUPS ARE ESTERIFIED WITH AN ALKYLENE OXIDE, SAID GLYCOL ALGINATE BEING FURTHER CHARACTERIZED BY A HYDROGENION CONCENTRATION IN 1% AQUEOUS SOLUTION NOT SUBSTANTIALLY BELOW PH 3.5, AND YIELDING CLEAR, VISCOIUS COLLOIDAL AQUEOUS SOLUTIONS.
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) | 1953-01-16 | 1953-07-18 | 1954-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-16 | 1957-07-18 | 1958-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-16 | 1961-07-18 | 1962-01-17 | $7700.00 | Window Closed / Lapsed |