US4393075B1 - - Google Patents
Abstract
Abstract New quinone compounds of the formula: <IMAGE> wherein R1 is methyl or methoxy, or the two R1 groups jointly represent -CH=CH-CH=CH-; X is -CH=CH- or -C=C-; Y1 is hydrogen, hydroxyl, carboxyl, cyano, acyloxy or -COZ in which Z is amino which may be substituted; m is zero or an integer of 1 to 3; n is zero or an integer of 1 to 10; n' is an integer of 1 to 5; k is an integer of 1 to 3; and when k is 2 or 3, n' is optionally variable within the range of 1 to 5 in each occurrence of the -X-(CH2)n' group; and their hydroquinone forms and salts, have useful physiological activities such as antiasthmatic, antiallergic and bloodpressure decreasing activities.
Inventors
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Bibliographic Details
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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) | 1992-07-03 | 1993-01-02 | 1993-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-03 | 1997-01-02 | 1997-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-03 | 2001-01-02 | 2001-07-04 | $7700.00 | Window Closed / Lapsed |