Patent US3702943A successfully refreshed from Google Patents.
Patent US3053846A successfully refreshed from Google Patents.
US3053846A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the manufacture of z
Assignee: —
•
Filing: —
•
Granted: 1962-09-11
•
Expires: 1979-09-11
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:45
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/06; C07D213/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
IN A METHOD OF PRODUCING 2,2-DIPYRIDLY BY MAINTAINING PYRIDINE IN CONTACT WITH RANEY NICKEL CATALYST, THE IMPROVEMENT WHICH COMPRISES: MAINTAINING SAID CATALYST IN A REACTION ZONE; PASSING AN UNREACTED PYRIDINE FEED INTO SAID REACTION ZONE WHEREBY 2,2-DIPYRIDLY IS FORMED THEREDIN; AND DISPLACING A MIXTURE OF UNREACTED PYRIDINE. AND REACTION PRODUCTS INCLUDING SAID 2,2-DIPYRIDYL FROM SAID REACTION ZONE WITH MORE PYRIDINE FEED.
Claim 2
Dependent Claim
61 words
IN A METHOD OF PRODUCING 2,2-DIPYRIDLY BY MAINTAINING PYRIDINE IN CONTACT WITH RANEY NICKEL CATALYST, THE IMPROVEMENT WHICH COMPRISES: MAINTAINING SAID CATALYST IN A REACTION ZONE; PASSING AN UNREACTED PYRIDINE FEED INTO SAID REACTION ZONE WHEREBY 2,2-DIPYRIDLY IS FORMED THEREDIN; AND DISPLACING A MIXTURE OF UNREACTED PYRIDINE. AND REACTION PRODUCTS INCLUDING SAID 2,2-DIPYRIDYL FROM SAID REACTION ZONE WITH MORE PYRIDINE FEED.
References Cited (Backward Citations)
US2066198A
Cited
US2384230A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-10 | 1966-03-12 | 1966-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-10 | 1970-03-12 | 1970-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-10 | 1974-03-12 | 1974-09-11 | $7700.00 | Window Closed / Lapsed |