US2937175A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of orotic acid
Assignee: —
•
Filing: —
•
Granted: 1960-05-17
•
Expires: 1977-05-17
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:53
CPC Classifications
C; C07; C07D; C07D411/00; C07D411/02; C07D411/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
A PROCESS FOR THE PREPARATION OF OROTIC ACID, WHICH COMPRISES MIXING UREA AND A MONOESTER OF OXALACETIC ACID OF THE FORMULA R-OOC.CH2CO.COOH, WHERE R REPRESENTS A LOWER ALKYL RADICAL, IN THE PRESENCE OF METHANOL, LEAVING THE MIXTURE TO STAND WHEREBY A CONDENSATION PRODUCT IS FORMED, ADDING AN ALKALI METAL HYDROXIDE TO THE CONDENSATION PRODUCT TO FORM AN ALKALI METAL SALT OF OROTIC ACID AND THEREAFTER ADDING A STRONG INORGANIC ACID.
Claim 2
Dependent Claim
70 words
A PROCESS FOR THE PREPARATION OF OROTIC ACID, WHICH COMPRISES MIXING UREA AND A MONOESTER OF OXALACETIC ACID OF THE FORMULA R-OOC.CH2CO.COOH, WHERE R REPRESENTS A LOWER ALKYL RADICAL, IN THE PRESENCE OF METHANOL, LEAVING THE MIXTURE TO STAND WHEREBY A CONDENSATION PRODUCT IS FORMED, ADDING AN ALKALI METAL HYDROXIDE TO THE CONDENSATION PRODUCT TO FORM AN ALKALI METAL SALT OF OROTIC ACID AND THEREAFTER ADDING A STRONG INORGANIC ACID.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-17 | 1963-11-16 | 1964-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-17 | 1967-11-16 | 1968-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-17 | 1971-11-16 | 1972-05-17 | $7700.00 | Window Closed / Lapsed |