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US3375247A
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Heterocyclic compounds and methods for their production
Assignee: Parke Davis and Co LLC
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Filing: 1965-08-02
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Granted: 1968-03-26
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Expires: 1985-08-02
Abstract
No abstract record available.
Inventors
- 👤 Doub Leonard
- 👤 Krolls Uldis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:54
CPC Classifications
C; C07; C07D; C07D239/00; C07D239/02; C07D239/20; C07D239/22; C07D239/24; C07D239/28; C07D239/46; C07D239/47; C07D239/52; C07D239/54; C07D239/545; C07D239/557; C07D239/56; C07D239/69
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3249603A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-26 | 1971-09-25 | 1972-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-26 | 1975-09-25 | 1976-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-26 | 1979-09-25 | 1980-03-26 | $7700.00 | Window Closed / Lapsed |