US3152188A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nu-substituted polyalkylene polyamines having 2-hydroxyethyl and mono-secondary-hydroxyl hydrocarbon substituents
Assignee: ChampionX LLC
•
Filing: 1960-11-15
•
Granted: 1964-10-06
•
Expires: 1980-11-15
Abstract
No abstract record available.
Inventors
- 👤 Willard H Kirkpatrick
- 👤 Virgil L Seale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:39
CPC Classifications
C; C07; C07C; C07C215/00; C07C215/02; C07C215/04; C07C215/06; C07C215/14; C08; C08G; C08G65/00; C08G65/02; C08G65/26; C08G65/2618; C08G65/2621; C08G65/2624; C08G73/00; C08G73/02; C08G73/0206; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
4 words
COMPOSITIONS HAVING THE FORMULA:
Claim 2
Dependent Claim
4 words
COMPOSITIONS HAVING THE FORMULA:
References Cited (Backward Citations)
US2243329A
Cited
US2817675A
Cited
US2701239A
Cited
US2767214A
Cited
US2697118A
Cited
US2944985A
Cited
US2792372A
Cited
US2944030A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-10-06 | 1968-04-06 | 1968-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-06 | 1972-04-06 | 1972-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-06 | 1976-04-06 | 1976-10-06 | $7700.00 | Window Closed / Lapsed |