US3200155A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Completely n-hydroxyalkylated and completely n-polyoxyalkylated polyhexamethylene polyamines
Assignee: ChampionX LLC
•
Filing: 1961-03-09
•
Granted: 1965-08-10
•
Expires: 1981-03-09
Abstract
No abstract record available.
Inventors
- 👤 Willard H Kirkpatrick
- 👤 Virgil L Seale
- 👤 Robert E Law
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:22
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/14; C23F11/141; C23F11/142; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/32; C08G18/3271; C08G18/3278
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
A N-SUBSTITUTED POLYHEXAMETHYLENE POLYAMINE HAVING THE FORMULA
Claim 2
Dependent Claim
7 words
A N-SUBSTITUTED POLYHEXAMETHYLENE POLYAMINE HAVING THE FORMULA
References Cited (Backward Citations)
US2243329A
Cited
US2817675A
Cited
US2701239A
Cited
US2767214A
Cited
US2944985A
Cited
US2901461A
Cited
US2944030A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-09 | 1969-02-08 | 1969-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-09 | 1973-02-08 | 1973-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-09 | 1977-02-08 | 1977-08-10 | $7700.00 | Window Closed / Lapsed |