US3873704A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel tetrahydroisoquinoline compounds in a pharmaceutical composition
Assignee: Tanabe Pharma Corp
•
Filing: 1973-09-04
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Granted: 1975-03-25
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Expires: 1993-09-04
Abstract
Abstract A tetrahydroisoquinoline compound of the dimethoxyphenyl WHEREIN R is a trimethoxyphenyl, dimethoxyplenyl or methylenedioxyphenyl radical, and pharmaceutically acceptable acid addition salts thereof. These compounds are peripheral vasodilators and are particularly effective in increasing the cerebral blood flow.
Inventors
- 👤 Eisakku Yamato
- 👤 Masao Wada
- 👤 Toshio Sekiguchi
- 👤 Masanori Sato
- 👤 Taku Nagao
- 👤 Hiromichi Nakajima
- 👤 Akio Kiyomoto
- 👤 Masazumi Kawanishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:33
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/33; A61K31/395; A61K31/435; A61K31/47; A61K31/472
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
15 words
A THERAPEUTIC COMPOSITION WHICH COMPRISES A PHARMACEUTICALLY EFFECTIVE AMOUNT OF A COMPOUND OF THE FORMULA;
Claim 2
Dependent Claim
15 words
A THERAPEUTIC COMPOSITION WHICH COMPRISES A PHARMACEUTICALLY EFFECTIVE AMOUNT OF A COMPOUND OF THE FORMULA;
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) | 1978-03-24 | 1978-09-23 | 1979-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-24 | 1982-09-23 | 1983-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-24 | 1986-09-23 | 1987-03-25 | $7700.00 | Window Closed / Lapsed |