US2985662A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of preparing 2-alkyl-1-hydroxyalkyl sulfates
Assignee: ChampionX LLC
•
Filing: 1958-07-16
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Granted: 1961-05-23
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Expires: 1978-07-16
Abstract
No abstract record available.
Inventors
- 👤 Carl E Johnson
- 👤 Fred G H Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:29
CPC Classifications
C; C07; C07D; C07D233/00; C07D233/04; C07D233/06; C07D233/08; C07D233/12; C07D233/14; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/16; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/03; Y10S516/05
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
10 words
THE PROCESS OF SULFATING A 2-ALKYL-1-HYDROXYALKYL IMIDAZOLINE OF THE FORMULA:
Claim 2
Dependent Claim
10 words
THE PROCESS OF SULFATING A 2-ALKYL-1-HYDROXYALKYL IMIDAZOLINE 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) | 1964-05-22 | 1964-11-21 | 1965-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-22 | 1968-11-21 | 1969-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-22 | 1972-11-21 | 1973-05-23 | $7700.00 | Window Closed / Lapsed |