US2727043A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1,-amino-3,-imino, isoindolenines
Assignee: Bayer AG
•
Filing: 1950-08-21
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Granted: 1955-12-13
•
Expires: 1970-08-21
Abstract
No abstract record available.
Inventors
- 👤 Rosch Georg
- 👤 Vollmann Heinrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:36
CPC Classifications
C; C07; C07D; C07D209/00; C07D209/02; C07D209/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A PROCESS FOR THE PREPARATION OF 1-AMINO-3-IMINOISOINDOLENINES, WHICH COMPRISES HEATING AN O-PHENYLENE COMPOUND SELECTED FROM THE GROUP CONSISTING OF O-PHENYLENE DICARBOXYLIC ACIDS, THEIR ANHYDRIDES, AMIDES AND IMIDES, WITH A COMPOUND SELECTED FROM THE GROUP CONSISTING OF UREA AND BIURET, A COMPOUND SELECTED FROM THE GROUP CONSISTIN OF AMMOMIUM MOLYBDATE AND AMMONIUM PHOSPHATE, AND AN AT LEAST EQUIMOLAR AMOUNT OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF AMMONIUM NITRATE AND AMMONIUM CHLORIDE, CALCULATED ON SAID O-PHENYLENE COMPOUND, AT TEMPERATURES FROM ABOUT 140* C. TO ABOUT 200* C.
Claim 2
Dependent Claim
87 words
A PROCESS FOR THE PREPARATION OF 1-AMINO-3-IMINOISOINDOLENINES, WHICH COMPRISES HEATING AN O-PHENYLENE COMPOUND SELECTED FROM THE GROUP CONSISTING OF O-PHENYLENE DICARBOXYLIC ACIDS, THEIR ANHYDRIDES, AMIDES AND IMIDES, WITH A COMPOUND SELECTED FROM THE GROUP CONSISTING OF UREA AND BIURET, A COMPOUND SELECTED FROM THE GROUP CONSISTIN OF AMMOMIUM MOLYBDATE AND AMMONIUM PHOSPHATE, AND AN AT LEAST EQUIMOLAR AMOUNT OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF AMMONIUM NITRATE AND AMMONIUM CHLORIDE, CALCULATED ON SAID O-PHENYLENE COMPOUND, AT TEMPERATURES FROM ABOUT 140* C. TO ABOUT 200* C.
References Cited (Backward Citations)
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Cited
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US2318783A
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US2410301A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-12 | 1959-06-13 | 1959-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-12 | 1963-06-13 | 1963-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-12 | 1967-06-13 | 1967-12-13 | $7700.00 | Window Closed / Lapsed |