US2612503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Basic ether-substituted isoquinolines
Assignee: Smith Kline & French Laboratories Ltd
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Filing: 1949-12-23
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Granted: 1952-09-30
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Expires: 1969-12-23
Abstract
No abstract record available.
Inventors
- 👤 Glenn E Ullyot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:30
CPC Classifications
C; C07; C07D; C07D217/00; C07D217/22; C07D217/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
24 words
A COMPOUND OF THE CLASS CONSISTING OF A FREE BASE AND ITS ORGANIC AND INORGANIC ACID ADDITION SALTS, SAID FREE BASE HAVING THE FORMULA:
Claim 2
Dependent Claim
24 words
A COMPOUND OF THE CLASS CONSISTING OF A FREE BASE AND ITS ORGANIC AND INORGANIC ACID ADDITION SALTS, SAID FREE BASE HAVING THE FORMULA:
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) | 1955-09-30 | 1956-03-31 | 1956-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-30 | 1960-03-31 | 1960-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-30 | 1964-03-31 | 1964-09-30 | $7700.00 | Window Closed / Lapsed |