Patent US3920546A successfully refreshed from Google Patents.
US3920546A
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N,N,N,N,N,N Hexaalkyl-beta-hydroxytrimethylene diammonium dihalides
Assignee: ChampionX LLC
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Filing: 1973-11-29
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Granted: 1975-11-18
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Expires: 1993-11-29
Abstract
Abstract Novel 1, 3 bis-quaternary ammonium compounds are used as flocculants in water treatments and coagulants in sewage and waste stream applications.
Inventors
- 👤 John D Newkirk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:34
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/52; C02F1/54
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
22 words
A METHOD OF FLOCCULATING WATER CONTAINING ENTRAINED INORGANIC SOLIDS COMPRISING TREATING SAID WATER WITH AN EFFECTIVE AMOUNT OF A WATER SOLUTION OF:
Claim 2
Independent Claim
22 words
A METHOD OF FLOCCULATING WATER CONTAINING ENTRAINED INORGANIC SOLIDS COMPRISING TREATING SAID WATER WITH AN EFFECTIVE AMOUNT OF A WATER SOLUTION OF:
Claim 3
Dependent Claim
22 words
A method as in claim 1 wherein said water is treated with a water solution of N,N,N,N'',N'',N'' hexamethyl- Beta -hydroxytrimethylene diammonium dibromide.
Claim 4
Dependent Claim
22 words
A method as in claim 1 wherein said water is treated with a water solution of N,N,N'',N''-tetrabutyl-N,N'' dimethyl- Beta -hydroxytrimethylene diammonium dibromide.
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) | 1978-11-17 | 1979-05-19 | 1979-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-17 | 1983-05-19 | 1983-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-17 | 1987-05-19 | 1987-11-18 | $7700.00 | Window Closed / Lapsed |