US2957003A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Imidazolines and imidazolinium salts
Assignee: ChampionX LLC
•
Filing: 1958-09-02
•
Granted: 1960-10-18
•
Expires: 1978-09-02
Abstract
No abstract record available.
Inventors
- 👤 Carl E Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:31
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/14; C23F11/149; C07; C07D; C07D233/00; C07D233/04; C07D233/06; C07D233/08; C07D233/12; C07D233/14; C23F11/16; Y; Y10; Y10S; Y10S260/00; Y10S260/15; Y10S260/19; Y10S260/20; Y10S516/00; Y10S516/01; Y10S516/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
19 words
A NEW COMPOSITION OF MATTER CONSISTING OF A COMPOUND SELECTED FROM A GROUP CONSISTING OF COMPOUNDS OF THE FORMULAE:
Claim 2
Dependent Claim
19 words
A NEW COMPOSITION OF MATTER CONSISTING OF A COMPOUND SELECTED FROM A GROUP CONSISTING OF COMPOUNDS OF THE FORMULAE:
References Cited (Backward Citations)
US2781358A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-18 | 1964-04-18 | 1964-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-18 | 1968-04-18 | 1968-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-18 | 1972-04-18 | 1972-10-18 | $7700.00 | Window Closed / Lapsed |