US2686777A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Isolation of dextran by alkaline earth hydroxide complex formation and products thereof
Assignee: Amstar Corp
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Filing: 1950-12-18
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Granted: 1954-08-17
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Expires: 1970-12-18
Abstract
No abstract record available.
Inventors
- 👤 Ernest L Wimmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:55
CPC Classifications
C; C08; C08B; C08B37/00; C08B37/0006; C08B37/0009; C08B37/0021; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/911; Y10S435/94; Y10S435/942
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
THE METHOD OF PRODUCING COMPLEX ADDITION PRODUCTS OF CALCIUM HYDROXIDE AND DEXTRAN WHICH COMPRISES REACTING AN AQUEOUS SOLUTION OF DEXTRAN CONTAINING DEXTRAN AS A PRINCIPAL CONSTITUTE WITH SOLUBLE CONSTITUENTS WHICH FORM CALCIUM HYDROXIDE AND IN SUFFICIENT AMOUNT TO FORM AT LEAST APPROXIMATELY 1 MOL OF CALCIUM HYDROXIDE FRO EACH GLUCOSE EQUIVALENT IN THE DEXTRAN, THEREBY PRECIPITATING THE DEXTRAN FROM THE SOLUTION AS A CALCIUM HYDROXIDE-DEXTRAN COMPLEX,
Claim 2
Independent Claim
66 words
THE METHOD OF PRODUCING COMPLEX ADDITION PRODUCTS OF CALCIUM HYDROXIDE AND DEXTRAN WHICH COMPRISES REACTING AN AQUEOUS SOLUTION OF DEXTRAN CONTAINING DEXTRAN AS A PRINCIPAL CONSTITUTE WITH SOLUBLE CONSTITUENTS WHICH FORM CALCIUM HYDROXIDE AND IN SUFFICIENT AMOUNT TO FORM AT LEAST APPROXIMATELY 1 MOL OF CALCIUM HYDROXIDE FRO EACH GLUCOSE EQUIVALENT IN THE DEXTRAN, THEREBY PRECIPITATING THE DEXTRAN FROM THE SOLUTION AS A CALCIUM HYDROXIDE-DEXTRAN COMPLEX,
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) | 1957-08-16 | 1958-02-15 | 1958-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-16 | 1962-02-15 | 1962-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-16 | 1966-02-15 | 1966-08-17 | $7700.00 | Window Closed / Lapsed |