Patent US2827465A successfully refreshed from Google Patents.
US2827465A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of preparation of x
Assignee: —
•
Filing: —
•
Granted: 1958-03-18
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Expires: 1975-03-18
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:55
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/24; C07D213/54; C07D213/55
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
36 words
IN A PROCESS FOR THE PREPARATION OF 4,4''-DIACETOXYDIPHENYL 2-PYRIDYL METHANE, THE STEPS WHICH COMPRISE REACTING 4,4''-DIMETHOXY-DIPHENYL ACETONITRILE WITH A HALOGENOPYRIDINE TO FORM 4,4''-DIMETHOXY-DIPHENYL PYRIDINO ACETONITRILE, AND THEN SUBJECTING THE LATTER COMPOUND TO HYDROLYSIS, DECARBOXYLATION AND DEMETHYLATION.
Claim 2
Dependent Claim
36 words
IN A PROCESS FOR THE PREPARATION OF 4,4''-DIACETOXYDIPHENYL 2-PYRIDYL METHANE, THE STEPS WHICH COMPRISE REACTING 4,4''-DIMETHOXY-DIPHENYL ACETONITRILE WITH A HALOGENOPYRIDINE TO FORM 4,4''-DIMETHOXY-DIPHENYL PYRIDINO ACETONITRILE, AND THEN SUBJECTING THE LATTER COMPOUND TO HYDROLYSIS, DECARBOXYLATION AND DEMETHYLATION.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-17 | 1961-09-16 | 1962-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-17 | 1965-09-16 | 1966-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-17 | 1969-09-16 | 1970-03-18 | $7700.00 | Window Closed / Lapsed |