US5512677A
Expired / Lapsed
US
⏱️ 0.0 years remaining
3-substituted methyl-2,3-dihydroimidazo 1,2-c!quinazoline derivatives, the preparation and use thereof
Assignee: National Science and Technology Council
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Filing: 1994-07-20
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Granted: 1996-04-30
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Expires: 2014-07-20
Abstract
Abstract The present invention provides a novel series of 3-substituted methyl-2,5-dihydroimidazo[1,2-c]quinazoline compounds. These compounds are found useful as an active ingredient for the treatment of hypertension and dysuria.
Inventors
- 👤 Ji-Wang Chern
- 👤 Guan-Yu Lu
- 👤 Yue-Jun Lai
- 👤 Mao-Hsiung Yen
- 👤 Pao-Luh Tao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:53
CPC Classifications
C; C07; C07D; C07D487/00; C07D487/02; C07D487/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
29 words
An imidazo 1,2-c!quinazoline compound or a pharmaceutically acceptable salt thereof selected from the group consisting of: 3-{4- 1-(2-methoxyphenyl)piperazinyl!}methyl-2,3-dihydroimidazo 1,2-c!quinazolin-5(6H)-one; 3-{4- 1-(2-chlorophenyl)piperazinyl!}methyl-2,3-dihydroimidazo 1,2-c!quinazolin-5(6H)-one; 3-{4- 1-(2-chlorophenyl)piperazinyl!}methyl-6-methyl-2,3-dihydroimidazo 1,2-c!quinazolin-5(6H)-one; and 3-{4- 1-(2-methoxyphenyl)piperazinyl!}methyl-6-methyl-2,3-dihydroimidazo 1,2-c!quinazolin-5(6H)-one.
Claim 2
Dependent Claim
29 words
An imidazo 1,2-c!quinazoline compound or a pharmaceutically acceptable salt thereof selected from the group consisting of: 3-{4- 1-(2-methoxyphenyl)piperazinyl!}methyl-2,3-dihydroimidazo 1,2-c!quinazolin-5(6H)-one; 3-{4- 1-(2-chlorophenyl)piperazinyl!}methyl-2,3-dihydroimidazo 1,2-c!quinazolin-5(6H)-one; 3-{4- 1-(2-chlorophenyl)piperazinyl!}methyl-6-methyl-2,3-dihydroimidazo 1,2-c!quinazolin-5(6H)-one; and 3-{4- 1-(2-methoxyphenyl)piperazinyl!}methyl-6-methyl-2,3-dihydroimidazo 1,2-c!quinazolin-5(6H)-one.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-04-30 | 1999-10-30 | 2000-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-04-30 | 2003-10-30 | 2004-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-04-30 | 2007-10-30 | 2008-04-30 | $7700.00 | Window Closed / Lapsed |