US3072690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-dispersible amido-quaternary ammonium salts
Assignee: ChampionX LLC
•
Filing: 1961-02-01
•
Granted: 1963-01-08
•
Expires: 1981-02-01
Abstract
No abstract record available.
Inventors
- 👤 Fred G H Lee
- 👤 Jerry J Svarz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:59
CPC Classifications
C; C07; C07C; C07C233/00; C07C233/89; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
11 words
A WATER-DISPRESIBLE AMIDO QUATERNARY AMMONIUM SALT HAVING THE GENERAL STRUCTURAL FORMULA:
Claim 2
Dependent Claim
11 words
A WATER-DISPRESIBLE AMIDO QUATERNARY AMMONIUM SALT HAVING THE GENERAL STRUCTURAL 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) | 1966-01-07 | 1966-07-09 | 1967-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-07 | 1970-07-09 | 1971-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-07 | 1974-07-09 | 1975-01-08 | $7700.00 | Window Closed / Lapsed |