US2701251A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of producing indoleacetic acids and new indoleacetic acids produced thereby
Assignee: LOWA STATE COLLEGE RES FOUNDAT
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Filing: 1951-04-21
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Granted: 1955-02-01
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Expires: 1971-04-21
Abstract
No abstract record available.
Inventors
- 👤 Sidney W Fox
- 👤 Milon W Bullock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:50
CPC Classifications
C; C07; C07D; C07D209/00; C07D209/02; C07D209/04; C07D209/10; C07D209/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
IN A PRCESS FOR PRODUCING INDOLEACETIC ACIDS FROM GLUTAMIC ACID, THE STEPS OF MIXING GLUTAMIC ACID AND A BASIC AQUEOUS SOLUTION OF A CHLORINE BLEACHING COMPOUND, ACIDIFYING THE RESULTING MIXTURE WITH A STRONG ACID TO FORM SUCCINALDEHYDIC ACID, MIXING THE SUCCINALDHYDIC ACID THUS FORMED WITH A PHENYLHYDRAZINE IN THE PRESENCE OF A MUTUAL SOLVENT FOR THE REACTANTS TO FORM A SUCCINALDEHYDIC ACID PHENYLHYDRAZONE, SEPARATING THE SUCCINALDEHYDIC ACID PHENYLDRAZONE, AND THEN CYCLIZING THE SUCCINALDHYDIC ACID PHENYLHYDRAZONE BY DISSOLVING IT IN A SATURATED LOWER ALIPHATIC ALCOHOL ACIDIFIED WITH A STRONG ACID AS A CATALYST AND HEATING THE RESULTING MIXTURE AT TEMPERATURES PROMOTING THE CYCLIZATION.
Claim 2
Dependent Claim
102 words
IN A PRCESS FOR PRODUCING INDOLEACETIC ACIDS FROM GLUTAMIC ACID, THE STEPS OF MIXING GLUTAMIC ACID AND A BASIC AQUEOUS SOLUTION OF A CHLORINE BLEACHING COMPOUND, ACIDIFYING THE RESULTING MIXTURE WITH A STRONG ACID TO FORM SUCCINALDEHYDIC ACID, MIXING THE SUCCINALDHYDIC ACID THUS FORMED WITH A PHENYLHYDRAZINE IN THE PRESENCE OF A MUTUAL SOLVENT FOR THE REACTANTS TO FORM A SUCCINALDEHYDIC ACID PHENYLHYDRAZONE, SEPARATING THE SUCCINALDEHYDIC ACID PHENYLDRAZONE, AND THEN CYCLIZING THE SUCCINALDHYDIC ACID PHENYLHYDRAZONE BY DISSOLVING IT IN A SATURATED LOWER ALIPHATIC ALCOHOL ACIDIFIED WITH A STRONG ACID AS A CATALYST AND HEATING THE RESULTING MIXTURE AT TEMPERATURES PROMOTING THE CYCLIZATION.
References Cited (Backward Citations)
US2222344A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-01-31 | 1958-08-02 | 1959-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-31 | 1962-08-02 | 1963-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-31 | 1966-08-02 | 1967-02-01 | $7700.00 | Window Closed / Lapsed |