Patent US3644525A successfully refreshed from Google Patents.
US3644525A
Expired / Lapsed
US
⏱️ 0.0 years remaining
N-aralkyl-and-arylhydroxyalkyl-propiophenones and the salts thereof
Assignee: Individual
•
Filing: 1969-03-17
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Granted: 1972-02-22
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Expires: 1989-03-17
Abstract
Abstract ((R1,R2,R3-PHENYL)-CO-CH(-R4)-CH2-N(-R5)-CH(-R6)-CH(-R7), R8,R9-BENZENE WHERE R1, R2 AND R3 ARE THE SAME OR DIFFERENT AND ARE HYDROGEN, CHLORINE, HYDROXYL, ALKOXY OR NITRO, R4 IS HYDROGEN, METHYL OR ETHYL, R5 IS HYDROGEN OR ALKYL R6 IS HYDROGEN OR METHYL, R7 IS HYDROGEN OR HYDROXYL, R8 IS HYDROGEN, ALKYL ALKOXY, HYDROXYL OR HALOGEN AND R9 IS HYDROXYL OR ALKYL WITH AT LEAST TWO CARBON ATOMS. THE COMPOUNDS CAN BE MADE IN THE FORM OF THEIR OPTICALLY ACTIVE ISOMERS OR DIASTEROISOMERS, SALTS OR QUATERNARY AMMONIUM SALTS. COMPOUNDS ARE PREPARED HAVING THE FORMULA
Inventors
- 👤 Kurt Thiele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:37
CPC Classifications
C; C07; C07C; C07C225/00; C07C225/02; C07C225/04; C07C225/06
Claims Analysis
Total Claims: 0
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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) | 1975-02-21 | 1975-08-23 | 1976-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-21 | 1979-08-23 | 1980-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-21 | 1983-08-23 | 1984-02-22 | $7700.00 | Window Closed / Lapsed |