US3352885A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of 7-amino-3-phenyl-coumarine compounds
Assignee: Bayer AG
•
Filing: 1965-03-02
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Granted: 1967-11-14
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Expires: 1985-03-02
Abstract
No abstract record available.
Inventors
- 👤 Schellhammer Carl-Wolfgang
- 👤 Muller Karl-Walter
- 👤 Raue Roderich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:56
CPC Classifications
C; C07; C07D; C07D311/00; C07D311/02; C07D311/04; C07D311/06; C07D311/08; C07D311/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
A PROCESS FOR PRODUCING 7-AMINO-3-PHENYL-COUMARINE COMPOUNDS COMPRISING HEATING A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
13 words
A PROCESS FOR PRODUCING 7-AMINO-3-PHENYL-COUMARINE COMPOUNDS COMPRISING HEATING A COMPOUND OF THE FORMULA
References Cited (Backward Citations)
US2680747A
Cited
US2881186A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-13 | 1971-05-15 | 1971-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-13 | 1975-05-15 | 1975-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-13 | 1979-05-15 | 1979-11-14 | $7700.00 | Window Closed / Lapsed |