US2523709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-viscosity starch ethers and process of preparing same
Assignee: General Mills Inc
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Filing: 1946-07-18
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Granted: 1950-09-26
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Expires: 1966-07-18
Abstract
No abstract record available.
Inventors
- 👤 Owen A Moe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:12
CPC Classifications
C; C08; C08B; C08B31/00; C08B31/08; C08B31/12
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
55 words
WATER SOLUBLE SALTS OF CARBOXYALKYL STARCH ETHER HAVING A DEGREE OF SUBSTITUTION WITHIN THE APPROXIMATE RANGE OF 0.2 TO 1.0 CHARACTERIZED BY BEING SUBSTANTIALLY FREE FROM WATER SOLUBLE ELECTROLYTES, A 3/4% AQUEOUS SOLUTION OF SAID ETHER HAVING A PH WITHIN THE RANGE OF 4-7 AND HAVING A BROOKFIELD VISCOSITY NOT SUBSTATIALLY LESS THAN 50,000 CPS.
Claim 2
Dependent Claim
55 words
WATER SOLUBLE SALTS OF CARBOXYALKYL STARCH ETHER HAVING A DEGREE OF SUBSTITUTION WITHIN THE APPROXIMATE RANGE OF 0.2 TO 1.0 CHARACTERIZED BY BEING SUBSTANTIALLY FREE FROM WATER SOLUBLE ELECTROLYTES, A 3/4% AQUEOUS SOLUTION OF SAID ETHER HAVING A PH WITHIN THE RANGE OF 4-7 AND HAVING A BROOKFIELD VISCOSITY NOT SUBSTATIALLY LESS THAN 50,000 CPS.
Claim 3
Dependent Claim
65 words
PROCESS OF PRODUCING WATER SOLUBLE SALTS OF CARBOXYALKYL STARCCH ETHER CAPABLE OF PRODUCING IMPROVED VISCOSITY IN DILUTE AQUEOUS SOLUTION WHICH COMPRISES REMOVING SUBSTANTIALLY ALL THE WATER SOLUBLE ELECTROLYTES FROM A WATER SOLUBLE SALT OF CARBOXYALKYL STARCH AND CONVERTING SUFFICIENT OF THE SALT GROUPS TO FREE CARBOXYL GROUPS SUCH THAT A 3/4% AQUEOUS SOLUTION OF THE PRODUCT WILL HAVE A PH WITHIN THE RANGE OF 4-7.
Claim 4
Dependent Claim
65 words
PROCESS OF PRODUCING WATER SOLUBLE SALTS OF CARBOXYALKYL STARCCH ETHER CAPABLE OF PRODUCING IMPROVED VISCOSITY IN DILUTE AQUEOUS SOLUTION WHICH COMPRISES REMOVING SUBSTANTIALLY ALL THE WATER SOLUBLE ELECTROLYTES FROM A WATER SOLUBLE SALT OF CARBOXYALKYL STARCH AND CONVERTING SUFFICIENT OF THE SALT GROUPS TO FREE CARBOXYL GROUPS SUCH THAT A 3/4% AQUEOUS SOLUTION OF THE PRODUCT WILL HAVE A PH WITHIN THE RANGE OF 4-7.
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) | 1953-09-25 | 1954-03-27 | 1954-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-25 | 1958-03-27 | 1958-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-25 | 1962-03-27 | 1962-09-26 | $7700.00 | Window Closed / Lapsed |