US2808407A
Expired / Lapsed
US
⏱️ 0.0 years remaining
New imidazolium compounds
Assignee: —
•
Filing: —
•
Granted: 1957-10-01
•
Expires: 1974-10-01
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:37
CPC Classifications
C; C07; C07D; C07D235/00; C07D235/02; C07D235/04; C07D235/20; C07D231/00; C07D231/02; C07D231/10; C07D231/12; C07D233/00; C07D233/04; C07D233/06; C07D233/54; C07D233/56; C07D233/64; C07D249/00; C07D249/02; C07D249/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
AN IMIDAZOLIUM COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
6 words
AN IMIDAZOLIUM 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) | 1960-09-30 | 1961-04-01 | 1961-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-30 | 1965-04-01 | 1965-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-30 | 1969-04-01 | 1969-10-01 | $7700.00 | Window Closed / Lapsed |