Patent US3438992A successfully refreshed from Google Patents.
US3438992A
Expired / Lapsed
US
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Certain lower-alkyl sulfinylmethyl pyridines
Assignee: Merck and Co Inc
•
Filing: 1966-11-09
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Granted: 1969-04-15
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Expires: 1986-11-09
Abstract
No abstract record available.
Inventors
- 👤 Tsung-Ying Shen
- 👤 Alexander Matzuk
- 👤 Conrad P Dorn Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:00
CPC Classifications
C; C07; C07D; C07D249/00; C07D249/02; C07D249/08; C07D209/00; C07D209/02; C07D209/04; C07D209/10; C07D209/14; C07D231/00; C07D231/02; C07D231/10; C07D231/12; C07D231/14; C07D231/16; C07D231/18; C07D231/54; C07D231/56; C07D233/00; C07D233/54; C07D233/56; C07D233/64; C07D233/66; C07D233/70; C07D233/90; C07D233/91; C07D233/92; C07D277/00; C07D277/02; C07D277/20; C07D277/22; C07D277/24; C07D277/26; C07D277/32; C07D277/34; C07D319/00; C07D319/10; C07D319/14; C07D319/16; C07D319/20; C07D333/00; C07D333/02; C07D333/04; C07D333/06; C07D333/14; C07D333/18; C07D333/26; C07D333/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3296272A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-14 | 1972-10-14 | 1973-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-14 | 1976-10-14 | 1977-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-14 | 1980-10-14 | 1981-04-15 | $7700.00 | Window Closed / Lapsed |