Patent US3801644A successfully refreshed from Google Patents.
US3801644A
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US
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Substituted-o-hydroxy-omega-(methylsulfinyl)acetophenones and process for producing same
Assignee: Warner Lambert Co LLC
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Filing: 1971-08-25
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Granted: 1974-04-02
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Expires: 1991-08-25
Abstract
Abstract THE PRESENT INVENTION RELATES TO SUBSTITUTED-O-HYDTROXYW-(METHYLSLFINYL) ACETOPHENONES OF THE FORMULA 1 CH3-SO-CH2-CO-Z(-R1)(-R2)-OH WHEREIN Z IS AN AROMATIC OR HEREROAROMATIC NUCLEUS SUCH AS BENZENE NAPHTHALENE, ANTHARACENE, PHENANTHRENE, PYRIDINE, QUINOLINE ISOQUINOLINE, CARBAZOLE, BENZOTHIAZINE, AND THE LIKE, WHEREIN R1 IS HALOGEN, LOWER ALKOXY, HYDROXY, ACETAMINO, ALKYL ARALKYL OR ARYL; R2 IS HYDROGEN HALOGEN, HYDROXY ALKYL OR ARYL; OR R1 AND R2 TAKEN TOGETHER MAY FORM A 1,3-DIOXOLE RING. THE COMPOUNDS OF THE PRESENT INVENTION ARE USEFUL AS INTERMEDIAES FOR THE PRODUCTION OF CHROMONED WHICH EXHIBIT ANTIALLERGENIC PROPERTIES.
Inventors
- 👤 M Strandtmann
- 👤 J Shavel
- 👤 S Klutchko
- 👤 M Cohen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:00
CPC Classifications
C; C07; C07D; C07D215/00; C07D215/02; C07D215/16; C07D215/20; C07D215/22; C07D215/233; C07C; C07C317/00; C07D279/00; C07D279/02
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) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |