US2811516A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Iodo carboxymethyl dextran and methods of making it
Assignee: Commonwealth Engineering Company of Ohio
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Filing: 1955-09-21
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Granted: 1957-10-29
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Expires: 1975-09-21
Abstract
No abstract record available.
Inventors
- 👤 Leo J Novak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:36
CPC Classifications
C; C08; C08B; C08B37/00; C08B37/0006; C08B37/0009; C08B37/0021
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
44 words
AS A NEW COMPOUND, IODO-CARBOXYMETHYL DEXTRAN CONTAINING PER ANHYDROGLUCOSE UNIT AN AVERAGE OF 0.5 TO 2.0 CARBOXYMETHYL GROUPS AND IN WHICH AN AVERAGE OF 1.0 TO 2.5 OF THE HYDROXYL GROUPS INITIALLY PRESENT IN THE CARBOXYMETHYL DEXTRAN PER ANHYDROGLUCOSE UNIT ARE REPLACED BY IODINE
Claim 2
Dependent Claim
44 words
AS A NEW COMPOUND, IODO-CARBOXYMETHYL DEXTRAN CONTAINING PER ANHYDROGLUCOSE UNIT AN AVERAGE OF 0.5 TO 2.0 CARBOXYMETHYL GROUPS AND IN WHICH AN AVERAGE OF 1.0 TO 2.5 OF THE HYDROXYL GROUPS INITIALLY PRESENT IN THE CARBOXYMETHYL DEXTRAN PER ANHYDROGLUCOSE UNIT ARE REPLACED BY IODINE
Claim 3
Independent Claim
42 words
THE METHOD OF MAKING IODO-CARBOXYMETHYL DEXTRAN WHICH COMPRISES DISSOLVING CARBOXYMETHYL DEXTRAN CONTAINING, PER ANHYDROGLUCOSE UNIT, AN AVERAGE OF 0.5 TO 2.0 CARBOXYMETHYL GROUPS, IN WATER, ADDING IODINE TO THE SOLUTION, AND HEATING THE SOLUTION WITH STIRRING UNTIL THE IODOCARBOXYMETHYL DEXTRAN IS FORMED.
Claim 4
Independent Claim
42 words
THE METHOD OF MAKING IODO-CARBOXYMETHYL DEXTRAN WHICH COMPRISES DISSOLVING CARBOXYMETHYL DEXTRAN CONTAINING, PER ANHYDROGLUCOSE UNIT, AN AVERAGE OF 0.5 TO 2.0 CARBOXYMETHYL GROUPS, IN WATER, ADDING IODINE TO THE SOLUTION, AND HEATING THE SOLUTION WITH STIRRING UNTIL THE IODOCARBOXYMETHYL DEXTRAN IS FORMED.
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) | 1960-10-28 | 1961-04-29 | 1961-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-28 | 1965-04-29 | 1965-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-28 | 1969-04-29 | 1969-10-29 | $7700.00 | Window Closed / Lapsed |