US3449368A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heterocyclic aliphatic acids
Assignee: Merck and Co Inc
•
Filing: 1964-12-30
•
Granted: 1969-06-10
•
Expires: 1984-12-30
Abstract
No abstract record available.
Inventors
- 👤 Tsung-Ying Shen
- 👤 Clifford H Shunk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:26
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/02; C07D307/34; C07D307/38; C07D307/40; C07D307/42; C07D307/36; C07D307/46; C07D307/54; C07D307/56; C07D307/68; C07D333/00; C07D333/02; C07D333/04; C07D333/06; C07D333/24; C07F; C07F3/00; C07F3/10; C07F3/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2721870A
Cited
US3002002A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-09 | 1972-12-09 | 1973-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-09 | 1976-12-09 | 1977-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-09 | 1980-12-09 | 1981-06-10 | $7700.00 | Window Closed / Lapsed |