US3213094A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing quinazolones
Assignee: —
•
Filing: —
•
Granted: 1965-10-19
•
Expires: 1982-10-19
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:11
CPC Classifications
C; C07; C07D; C07D239/00; C07D239/70; C07D239/72; C07D239/86; C07D239/88; C07D239/91
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
IN THE PROCESS OF PREPARING SUBSTITUTED 4-QUINAZOLONES THE IMPROVEMENT WHICH COMPRISES HEATING A MIXTURE OF 1 MOLE OF O-AMINO-CYCLIC CARBOXYLIC ACID SELECTED FROM THE CLASS CONSISTING OF AROMATIC AND HETEROCYCLIC CARBOXYLIC ACIDS, 1 TO 1 1/2 MOLES OF ALIPHATIC ACID ANHYDRIDE, ABOUT 2 TO 2 1/2 MOLES OF A PRIMARY AMINE SELECTED FROM THE CLASS CONSISTING OF PRIMARY ALIPHATIC, AROMATIC AND ARALIPHATIC AMINES, THE AROMATIC AMINE WHEN CONTAINING A CONDENSED RING SYSTEM BEARING THE AMINE GROP IN THE B-POSITION THEREOF, IN THE PRESENCE OF 1 TO 3 MOLES OF A PHOSPHORUS CHLORIDE SELECTED FROM THE CLASS CONSISTING OF PHOSPHORUS TRICHLORIDE, PHOSPHORUS OXYCHLORIDE AND THIONYL CHLORIDE AND A NORMALLY LIQUID INERT ORGANIC SOLVENT.
Claim 2
Dependent Claim
112 words
IN THE PROCESS OF PREPARING SUBSTITUTED 4-QUINAZOLONES THE IMPROVEMENT WHICH COMPRISES HEATING A MIXTURE OF 1 MOLE OF O-AMINO-CYCLIC CARBOXYLIC ACID SELECTED FROM THE CLASS CONSISTING OF AROMATIC AND HETEROCYCLIC CARBOXYLIC ACIDS, 1 TO 1 1/2 MOLES OF ALIPHATIC ACID ANHYDRIDE, ABOUT 2 TO 2 1/2 MOLES OF A PRIMARY AMINE SELECTED FROM THE CLASS CONSISTING OF PRIMARY ALIPHATIC, AROMATIC AND ARALIPHATIC AMINES, THE AROMATIC AMINE WHEN CONTAINING A CONDENSED RING SYSTEM BEARING THE AMINE GROP IN THE B-POSITION THEREOF, IN THE PRESENCE OF 1 TO 3 MOLES OF A PHOSPHORUS CHLORIDE SELECTED FROM THE CLASS CONSISTING OF PHOSPHORUS TRICHLORIDE, PHOSPHORUS OXYCHLORIDE AND THIONYL CHLORIDE AND A NORMALLY LIQUID INERT ORGANIC SOLVENT.
References Cited (Backward Citations)
US2915521A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-18 | 1969-04-19 | 1969-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-18 | 1973-04-19 | 1973-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-18 | 1977-04-19 | 1977-10-19 | $7700.00 | Window Closed / Lapsed |