US3159640A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing 2-mercaptopyridine-nu oxide
Assignee: Olin Corp
•
Filing: 1963-04-23
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Granted: 1964-12-01
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Expires: 1983-04-23
Abstract
No abstract record available.
Inventors
- 👤 Robert E Mcclure
- 👤 David A Shermer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:32
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/89
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
A PROCESS FOR THE PRODUCTION OF 2-MERCAPTOPYRIDINEN-OXIDE COMPRISING REACTING A 2-HALOPYRIDINE-N-OXIDE WITH A MIXTURE OF AN ALKALI METAL SULFIDE AND AN ALKALI METAL HYDROSULFIDE, THE ALKALI METAL SULFIDE BEING IN A MOLAR RATIO WITH THE ALKALI METAL HYDROSULFIDE OF FROM ABOUT 0.3:1 TO 5.0:1.
Claim 2
Dependent Claim
44 words
A PROCESS FOR THE PRODUCTION OF 2-MERCAPTOPYRIDINEN-OXIDE COMPRISING REACTING A 2-HALOPYRIDINE-N-OXIDE WITH A MIXTURE OF AN ALKALI METAL SULFIDE AND AN ALKALI METAL HYDROSULFIDE, THE ALKALI METAL SULFIDE BEING IN A MOLAR RATIO WITH THE ALKALI METAL HYDROSULFIDE OF FROM ABOUT 0.3:1 TO 5.0:1.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-12-01 | 1968-06-01 | 1968-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-12-01 | 1972-06-01 | 1972-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-12-01 | 1976-06-01 | 1976-12-01 | $7700.00 | Window Closed / Lapsed |