Patent US4905331A successfully refreshed from Google Patents.
Patent US2989534A successfully refreshed from Google Patents.
US2989534A
Expired / Lapsed
US
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Process of making 2-cyanopyridines
Assignee: Reilly Tar and Chemical Corp
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Filing: 1959-10-08
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Granted: 1961-06-20
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Expires: 1979-10-08
Abstract
No abstract record available.
Inventors
- 👤 Francis E Cislak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:38
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/78; C07D213/84
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
32 words
THE PROCESS OF PREPARING 2-CYANOPYRIDINES WHICH COMPRISES MIXING A SOLUTION OF A 2-METHYLPYRIDINE-N-OXIDE WITH A COMPOUND OF THE CLASS CONSISTING OF ACETYL NITRITE, PROPIONYLNITRITE AND BENZOYL NITRITE AND HEATING THE RESULTANT MIXTURE.
Claim 2
Dependent Claim
32 words
THE PROCESS OF PREPARING 2-CYANOPYRIDINES WHICH COMPRISES MIXING A SOLUTION OF A 2-METHYLPYRIDINE-N-OXIDE WITH A COMPOUND OF THE CLASS CONSISTING OF ACETYL NITRITE, PROPIONYLNITRITE AND BENZOYL NITRITE AND HEATING THE RESULTANT MIXTURE.
References Cited (Backward Citations)
US2736739A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |