Patent US2608557A successfully refreshed from Google Patents.
US2608557A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing 2-substituted quinolines
Assignee: GAF Chemicals Corp
•
Filing: 1948-12-15
•
Granted: 1952-08-26
•
Expires: 1968-12-15
Abstract
No abstract record available.
Inventors
- 👤 John W Copenhaver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:17
CPC Classifications
C; C07; C07D; C07D215/00; C07D215/02; C07D215/04; C07D215/16; C07D215/20; C07D215/24; C07D215/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
A METHOD OF PRODUCING 2-SUBSTITUTED QUINOLINES WHICH COMPRISES REACTING UNDER ANHYDROUS CONDITIONS A PRIMARY AROMATIC AMINE WITH A 1,1,3TRIALKOXY 3-SUBSTITUTED PROPANE OF THE FORMULA: FIGL-01 WHEREIN R IS ALKYL AND R'' IS A MEMBER OF THE GROUP CONSISTING OF ALKYL AND ARYL RADICALS, IN THE PRESENCE OF FROM 0.5 TO 5% BY WEIGHT THEREOF OF AN ANHYDROUS ACID CATALYST.
Claim 2
Independent Claim
59 words
A METHOD OF PRODUCING 2-SUBSTITUTED QUINOLINES WHICH COMPRISES REACTING UNDER ANHYDROUS CONDITIONS A PRIMARY AROMATIC AMINE WITH A 1,1,3TRIALKOXY 3-SUBSTITUTED PROPANE OF THE FORMULA: FIGL-01 WHEREIN R IS ALKYL AND R'' IS A MEMBER OF THE GROUP CONSISTING OF ALKYL AND ARYL RADICALS, IN THE PRESENCE OF FROM 0.5 TO 5% BY WEIGHT THEREOF OF AN ANHYDROUS ACID CATALYST.
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) | 1955-08-26 | 1956-02-25 | 1956-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-26 | 1960-02-25 | 1960-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-26 | 1964-02-25 | 1964-08-26 | $7700.00 | Window Closed / Lapsed |