US3147262A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nu, nu'-tetrahydro-bipyridyl, -biquinolyl and -biacridyl dicarboxylic acid derivatives
Assignee: Pure Oil Co
•
Filing: 1960-05-13
•
Granted: 1964-09-01
•
Expires: 1980-05-13
Abstract
No abstract record available.
Inventors
- 👤 Walter E Kramer
- 👤 Louis A Joo
- 👤 Robert M Haines
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:09
CPC Classifications
C; C07; C07D; C07D215/00; C07D215/02; C07D215/04; C07D215/08; C07D211/00; C07D211/04; C07D211/80; C07D211/82; C10; C10M; C10M2201/00; C10M2201/02; C10M2215/00; C10M2215/22; C10M2215/221; C10M2215/225; C10M2215/226; C10M2215/24; C10M2215/30; C10N; C10N2010/00; C10N2010/02; C10N2050/00; C10N2050/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA:
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) | 1967-09-01 | 1968-03-02 | 1968-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-01 | 1972-03-02 | 1972-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-01 | 1976-03-02 | 1976-09-01 | $7700.00 | Window Closed / Lapsed |