Patent US4018824A successfully refreshed from Google Patents.
US4018824A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1-Aryloxy-3-aminopropane derivatives
Assignee: Aska Pharmaceutical Co Ltd
•
Filing: 1974-09-20
•
Granted: 1977-04-19
•
Expires: 1994-09-20
Abstract
Abstract A process for the preparation of 1-aryloxy-3-aminopropane derivatives and acid addition salts thereof and such products per se, the process comprising ring opening of tertiary azetidinol derivatives. They possess beta -adrenegic block activity and an activity of controlling secretion of gastric juice and are therefore useful antiulcerative medicines for peptic ulcer and duodenal ulcer.
Inventors
- 👤 Kunio Tsukamoto
- 👤 Yasushi Suzuki
- 👤 Akihiro Izumi
- 👤 Yoshio Hiramatsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:25
CPC Classifications
C; C07; C07D; C07D209/00; C07D209/02; C07D209/04; C07D209/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
2 words
2-Benzyloxy-1-(2', 3'-dimethylphenyloxy)-3-tert.-butyl-amino-propane.
Claim 2
Dependent Claim
2 words
2-Benzyloxy-1-(2', 3'-dimethylphenyloxy)-3-tert.-butyl-amino-propane.
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) | 1980-04-18 | 1980-10-18 | 1981-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-18 | 1984-10-18 | 1985-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-18 | 1988-10-18 | 1989-04-19 | $7700.00 | Window Closed / Lapsed |