US2988482A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Product and method for producing clinical dextran including ionizable calcium
Assignee: Commonwealth Engineering Company of Ohio
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Filing: 1956-10-15
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Granted: 1961-06-13
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Expires: 1976-10-15
Abstract
No abstract record available.
Inventors
- 👤 Leo J Novak
- 👤 Everette E Witt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:13
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/70; A61K31/715
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
149 words
A METHOD FOR OBTAINING CLINICAL DEXTRAN IN A CONDITION IN WHICH IT DOES NOT PROLONG THE NORMAL BLEEDING TIME WHEN IT IS INJECTED INTRAVENOUSLY, WHICH COMPRISES MIXING CLINICAL DEXTRAN WHICH IS PYROGEN-FREE, NONANAPHYLACTIC, NON-ANTIGENIC, HAS BEEN DE-ONIZED BY MEANS OF ION-EXCHANGE RESINS, AND DOES NOT CONTAIN IONIZABLE CALCIUM, BUT WHICH DOES PROLONG THE NORMAL BLEEDING TIME, WITH A PHYSIOLOGICALLY HARMLESS, IONIZABLE, BASIC CALCIUM SALT AND WHICH IS SELECTED FROM THE GROUP CONSISTING OF CALCIUM CARBONATE, CALCIUM PHOSPHATE, CALCIUM HYDROXIDE CALCIUM LACTATE AND CALCIUM LEVULINATE, SAID CALCIUM SALT BEING PRESENT IN AN AMOUNT OF 10 GMS. TO 50 GMS. OF THE SALT PER 1000 CCS. OF THE CLINICAL DEXTRAN AT ORDINARY TEMPERATURE AND WITH AGITATION, ALLOWING THE MIXTURE TO STAND FOR SETTLING, AND FILTERING THE SAME TO OBTAIN, AS FILTRATE, THE CLINICAL DEXTRAN IN A CONDITION IN WHICH IT COMPRISES IONIZABLE CALCIUM AND DOES NOT PROLONG THE NORMAL BLEEDING TIME.
Claim 2
Independent Claim
149 words
A METHOD FOR OBTAINING CLINICAL DEXTRAN IN A CONDITION IN WHICH IT DOES NOT PROLONG THE NORMAL BLEEDING TIME WHEN IT IS INJECTED INTRAVENOUSLY, WHICH COMPRISES MIXING CLINICAL DEXTRAN WHICH IS PYROGEN-FREE, NONANAPHYLACTIC, NON-ANTIGENIC, HAS BEEN DE-ONIZED BY MEANS OF ION-EXCHANGE RESINS, AND DOES NOT CONTAIN IONIZABLE CALCIUM, BUT WHICH DOES PROLONG THE NORMAL BLEEDING TIME, WITH A PHYSIOLOGICALLY HARMLESS, IONIZABLE, BASIC CALCIUM SALT AND WHICH IS SELECTED FROM THE GROUP CONSISTING OF CALCIUM CARBONATE, CALCIUM PHOSPHATE, CALCIUM HYDROXIDE CALCIUM LACTATE AND CALCIUM LEVULINATE, SAID CALCIUM SALT BEING PRESENT IN AN AMOUNT OF 10 GMS. TO 50 GMS. OF THE SALT PER 1000 CCS. OF THE CLINICAL DEXTRAN AT ORDINARY TEMPERATURE AND WITH AGITATION, ALLOWING THE MIXTURE TO STAND FOR SETTLING, AND FILTERING THE SAME TO OBTAIN, AS FILTRATE, THE CLINICAL DEXTRAN IN A CONDITION IN WHICH IT COMPRISES IONIZABLE CALCIUM AND DOES NOT PROLONG THE NORMAL BLEEDING TIME.
Claim 3
Dependent Claim
20 words
A CLINICAL DEXTRAN PRODUCT USEFUL FOR INTRAVENOUS INJECTION WHICH INCLUDES IONIZABLE CALCIUM AND PRODUCED AS SET FORTH IN CLAIM 1.
References Cited (Backward Citations)
US2565507A
Cited
US2685579A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-12 | 1964-12-12 | 1965-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-12 | 1968-12-12 | 1969-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-12 | 1972-12-12 | 1973-06-13 | $7700.00 | Window Closed / Lapsed |