Patent US2615892A successfully refreshed from Google Patents.
US2615892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pyridyl amines
Assignee: Wingfoot Corp
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Filing: 1946-06-24
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Granted: 1952-10-28
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Expires: 1966-06-24
Abstract
No abstract record available.
Inventors
- 👤 Albert M Clifford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:48
CPC Classifications
C; C07; C07D; C07D229/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
A METHOD OF PREPARING 2-(2-PYRIDYL) ETHYL AMINES WHICH COMPRISES HEATING A MIXTURE COMPRISING AS THE SOLE REACTIVE INGREDIENTS 2-VINYL PYRIDINE AND AN AMINE HAVING A HYDROGEN ATTACHED DIRECTLY TO THE AMINO NITROGEN ATOM UNTIL THE REACTION IS SUBSTANTIALLY COMPLETE AND SEPARATING THE RESULTING PRODUCT.
Claim 2
Independent Claim
44 words
A METHOD OF PREPARING 2-(2-PYRIDYL) ETHYL AMINES WHICH COMPRISES HEATING A MIXTURE COMPRISING AS THE SOLE REACTIVE INGREDIENTS 2-VINYL PYRIDINE AND AN AMINE HAVING A HYDROGEN ATTACHED DIRECTLY TO THE AMINO NITROGEN ATOM UNTIL THE REACTION IS SUBSTANTIALLY COMPLETE AND SEPARATING THE RESULTING PRODUCT.
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) | 1955-10-28 | 1956-04-28 | 1956-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-28 | 1960-04-28 | 1960-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-28 | 1964-04-28 | 1964-10-28 | $7700.00 | Window Closed / Lapsed |