US2520255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glucuronic acid synthesis
Assignee: Individual
•
Filing: 1945-11-17
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Granted: 1950-08-29
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Expires: 1965-11-17
Abstract
No abstract record available.
Inventors
- 👤 Earl A Peterman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:00
CPC Classifications
C; C07; C07H; C07H7/00; C07H7/02; C07H7/033
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
141 words
THE METHOD OF PRODUCING GLUCURONIC ACID OR A COMPOUND THEREOF WHICH INCLUDES SUBJECTING A GLUCOSE COMPOUND HAVING A FREE PRIMARY ALCOHOL GROUP AND A PROTECTED ALDEHYDE GROUP TO THE ACTION OF NITROGEN DIOXIDE AT A TEMPERATURE NOT SUBSTANTIALLY IN EXCESS OF 20*C. TO CONVERT THE ALCOHOL GROUP TO A CARBOXYL GROUP, SEPARATING GLUCURONIC ACID IN SOLUTION BY HYDROLYZING THE OXIDIZED MATERIAL IN A WEAK SOLUTION OF SULPHURIC ACID, COMBINING THE HYDROLYZATE WITH A SMALL QUANTITY OF BARBITURIC ACID, PRECIPITATING THE SULPHURIC ACID AS BARIUM SULPHATE, FILTERING THE MATERIAL TO REMOVE ALL PRECIPITATE, NEUTRALIZING THE GLUCURONIC ACID BY BARIUM CARBONATE, PRECIPITATING THE PURE BARIUM GLUCURONATE IN ALCOHOL, REMOVING THE PRECIPITATE BY FILTRATION, REACTING THE PRECIPITATE WITH A SOLUTION OF SULPHURIC ACID TO FORM BARIUM SULPHATE, REMOVING THE PRECIPITATED BARIUM SULPHATE BY FILTRATION, AND EVAPORATING THE FILTRATE TO CRYSTALLIZE OUT THE GLUCURONIC ACID.
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) | 1953-08-28 | 1954-02-27 | 1954-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-28 | 1958-02-27 | 1958-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-28 | 1962-02-27 | 1962-08-29 | $7700.00 | Window Closed / Lapsed |