Patent US3819637A successfully refreshed from Google Patents.
US3819637A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1,2-diphenyl-1,2,3,4-tetrahydroquinolines
Assignee: STWB Inc
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Filing: 1971-06-23
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Granted: 1974-06-25
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Expires: 1991-06-23
Abstract
Abstract THE INVENTION RELATES TO NOVEL 1-(4-R1O-PHENYL)-2-(4R2-PHENYL)-6-R3-1,2,3,4-TETRAHYDROQUINOLINES HAVING ANTIFERTILITY AND HYPOCHOLESTEROLEMIC ACTIVITES, TO THEIR PREPARATION, AND TO NOVEL INTERMEDIATES THEREFOR.
Inventors
- 👤 M Bell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:38
CPC Classifications
C; C07; C07D; C07D215/00; C07D215/02; C07D215/16; C07D215/20; C07D215/22; C07D215/227; C07D215/04; C07D215/06; C07D215/12; C07D215/14; C07D215/18; C07D215/233; C07D215/48; C07D215/54; C07D215/56; C07D265/00; C07D265/04; C07D265/12; C07D265/14; C07D265/24; C07D265/26
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) | 1977-06-24 | 1977-12-24 | 1978-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-24 | 1981-12-24 | 1982-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-24 | 1985-12-24 | 1986-06-25 | $7700.00 | Window Closed / Lapsed |