US3700844A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quaternary fluorsilicon dispersant
Assignee: ChampionX LLC
•
Filing: 1971-05-07
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Granted: 1972-10-24
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Expires: 1991-05-07
Abstract
Abstract Surface active agents are produced by forming quaternary fluorosilicon compounds by reacting perfluoro-alkyl esters with tertiary diamines.
Inventors
- 👤 Elemer Domba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:42
CPC Classifications
C; C11; C11D; C11D1/00; C11D1/004; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/18; C07F7/1804
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
11 words
The fluorosilicon quaternary compound of claim 1 wherein the compound is:
References Cited (Backward Citations)
US3012006A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |