US3190893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing 9, 10-dihydroanthracenes
Assignee: H Lundbeck AS
•
Filing: 1962-02-12
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Granted: 1965-06-22
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Expires: 1982-02-12
Abstract
No abstract record available.
Inventors
- 👤 Torkil O Holm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:52
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/33; C; C07; C07D; C07D279/00; C07D279/10; C07D295/00; C07D295/02; C07D295/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
11 words
A METHOD OF PRODUCING A 9,10-DIHYDROANTHRACENE OF THE GENERAL STRUCTURAL FORMULA:
Claim 2
Independent Claim
11 words
A METHOD OF PRODUCING A 9,10-DIHYDROANTHRACENE OF THE GENERAL STRUCTURAL 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) | 1968-06-21 | 1968-12-21 | 1969-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-21 | 1972-12-21 | 1973-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-21 | 1976-12-21 | 1977-06-22 | $7700.00 | Window Closed / Lapsed |