US3312733A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optically active naphthylethanolamines and the salts thereof
Assignee: Imperial Chemical Industries Ltd
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Filing: 1962-08-13
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Granted: 1967-04-04
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Expires: 1982-08-13
Abstract
No abstract record available.
Inventors
- 👤 Howe Ralph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:44
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/13; A61K31/135; C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/24; C07D213/36; C07D213/38; C07B; C07B2200/00; C07B2200/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
15 words
AN OPTICALLY ACTIVE NAPHTHALENE DERIVATIVE SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS HAVING THE FORMULA:
Claim 2
Dependent Claim
15 words
AN OPTICALLY ACTIVE NAPHTHALENE DERIVATIVE SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS 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) | 1970-04-03 | 1970-10-03 | 1971-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-03 | 1974-10-03 | 1975-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-03 | 1978-10-03 | 1979-04-04 | $7700.00 | Window Closed / Lapsed |