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US2897193A
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Sulfuric acid esters of dextranic acid
Assignee: Commonwealth Engineering Company of Ohio
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Filing: 1954-05-28
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Granted: 1959-07-28
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Expires: 1974-05-28
Abstract
No abstract record available.
Inventors
- 👤 Leo J Novak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:20
CPC Classifications
C; C07; C07C; C07C59/00; C07C59/01; C07C59/10; C07C59/105; C07G; C07G99/00; C07G99/002; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/911; Y10S435/913; Y10S435/92
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
AS A NEW PRODUCT, AN ALKALI METAL SALT OF SULFURIC ACID ESTER OF THE CARBOXYLATED POLYMER OBTAINED AS BYPRODUCT WHEN NATIVE DEXTRAN IS SPLIT INTO SEGMENTS SUITABLE FOR USE AS BLOOD PLASMA EXTENDERS BY THE DEXTRANSPLITTING ENZYME PRODUCED BY THE MOLD ASPERGILLUS WENTII, SAID SALT HAVING A SULFUR CONTENT BETWEEN 3% AND 20%.
Claim 2
Dependent Claim
53 words
AS A NEW PRODUCT, AN ALKALI METAL SALT OF SULFURIC ACID ESTER OF THE CARBOXYLATED POLYMER OBTAINED AS BYPRODUCT WHEN NATIVE DEXTRAN IS SPLIT INTO SEGMENTS SUITABLE FOR USE AS BLOOD PLASMA EXTENDERS BY THE DEXTRANSPLITTING ENZYME PRODUCED BY THE MOLD ASPERGILLUS WENTII, SAID SALT HAVING A SULFUR CONTENT BETWEEN 3% AND 20%.
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) | 1962-07-27 | 1963-01-26 | 1963-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-27 | 1967-01-26 | 1967-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-27 | 1971-01-26 | 1971-07-28 | $7700.00 | Window Closed / Lapsed |