Patent US3205233A successfully refreshed from Google Patents.
US3205233A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dihydroisoquinolines
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1963-05-13
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Granted: 1965-09-07
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Expires: 1983-05-13
Abstract
No abstract record available.
Inventors
- 👤 Clarkson Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:02
CPC Classifications
C; C07; C07D; C07D455/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
12 words
A DIHYDROISOQUINOLINE SELECTED FROM THE GROUP CONSISTING OF DIHYDROISOQUINOLINES HAVING THE FORMULA:
Claim 2
Dependent Claim
12 words
A DIHYDROISOQUINOLINE SELECTED FROM THE GROUP CONSISTING OF DIHYDROISOQUINOLINES HAVING 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) | 1968-09-06 | 1969-03-08 | 1969-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-06 | 1973-03-08 | 1973-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-06 | 1977-03-08 | 1977-09-07 | $7700.00 | Window Closed / Lapsed |