Patent US3149106A successfully refreshed from Google Patents.
US3149106A
Expired / Lapsed
US
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Method of preparation of heterocyclic compounds
Assignee: Smith Kline & French Laboratories Ltd
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Filing: 1962-02-23
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Granted: 1964-09-15
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Expires: 1982-02-23
Abstract
No abstract record available.
Inventors
- 👤 Loev Bernard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:33
CPC Classifications
C; C07; C07D; C07D239/00; C07D239/02; C07D239/20; C07D239/22; C07D239/70; C07D239/72; C07D239/95; C07D239/96; C07D263/00; C07D263/02; C07D263/30; C07D263/34; C07D263/44; C07D265/00; C07D265/04; C07D265/12; C07D265/14; C07D265/24; C07D265/26; C07D279/00; C07D279/04; C07D279/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
9 words
THE METHOD OF PREPARING HETEROCYCLIC COMPOUNDS OF THE FORMULA:
Claim 2
Independent Claim
9 words
THE METHOD OF PREPARING HETEROCYCLIC COMPOUNDS OF 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) | 1967-09-15 | 1968-03-16 | 1968-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-15 | 1972-03-16 | 1972-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-15 | 1976-03-16 | 1976-09-15 | $7700.00 | Window Closed / Lapsed |