US2847414A
Expired / Lapsed
US
⏱️ 0.0 years remaining
4-arylpyridines
Assignee: Rohm and Haas Co
•
Filing: 1956-04-13
•
Granted: 1958-08-12
•
Expires: 1976-04-13
Abstract
No abstract record available.
Inventors
- 👤 Claude J Schmidle
- 👤 Richard C Mansfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:07
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
21 words
A PROCESS FOR PREAPRING 4-ARYLPYRIDINES WHICH COMPRISES HEATING AT A DEHYDROGENATING TEMPERATURE BETWEEN 125* AND 220*C. A COMPOUND OF THE STRUCTURE
Claim 2
Dependent Claim
21 words
A PROCESS FOR PREAPRING 4-ARYLPYRIDINES WHICH COMPRISES HEATING AT A DEHYDROGENATING TEMPERATURE BETWEEN 125* AND 220*C. A COMPOUND OF THE STRUCTURE
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) | 1961-08-11 | 1962-02-10 | 1962-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-11 | 1966-02-10 | 1966-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-11 | 1970-02-10 | 1970-08-12 | $7700.00 | Window Closed / Lapsed |