US3170948A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of dialkyl cyanovinylamines
Assignee: Wyeth Holdings LLC
•
Filing: 1963-01-18
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Granted: 1965-02-23
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Expires: 1983-01-18
Abstract
No abstract record available.
Inventors
- 👤 Frazza Everett Joseph
- 👤 Rapoport Lorence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:02
CPC Classifications
C; C07; C07C; C07C255/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
A METHOD OF PREPARING A MEMBER SELECTED FROM THE GROUP CONSISTING OF DIALKYL B-CYANOVINYLAMINES AND THE HYDROCHLORIDE SALTS THEREOF WHICH COMPRISES REACTING ONE MOLE OF B-CHLOROACRYLONITRILE WITH ONE MOLE OF A TRIALKYLAMINE IN WHICH THE ALKYL RADICAL CONTAINS FROM 2 TO 12 CARBON ATOMS, SAID REACTION BEING A LIQUID PHASE REACTION AND BEING CONDUCTED AT A TEMPERATURE GREATER THAN ABOUT 40*C. WHEREBY AN OLEFIN IS EVOLVED.
Claim 2
Independent Claim
66 words
A METHOD OF PREPARING A MEMBER SELECTED FROM THE GROUP CONSISTING OF DIALKYL B-CYANOVINYLAMINES AND THE HYDROCHLORIDE SALTS THEREOF WHICH COMPRISES REACTING ONE MOLE OF B-CHLOROACRYLONITRILE WITH ONE MOLE OF A TRIALKYLAMINE IN WHICH THE ALKYL RADICAL CONTAINS FROM 2 TO 12 CARBON ATOMS, SAID REACTION BEING A LIQUID PHASE REACTION AND BEING CONDUCTED AT A TEMPERATURE GREATER THAN ABOUT 40*C. WHEREBY AN OLEFIN IS EVOLVED.
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) | 1968-02-23 | 1968-08-24 | 1969-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-23 | 1972-08-24 | 1973-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-23 | 1976-08-24 | 1977-02-23 | $7700.00 | Window Closed / Lapsed |