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Patent US4454047A successfully refreshed from Google Patents.
US4454047A
Expired / Lapsed
US
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Process of treating aqueous systems
Assignee: Baker Hughes Holdings LLC
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Filing: 1982-05-18
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Granted: 1984-06-12
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Expires: 2002-05-18
Abstract
Abstract A process of treating an aqueous system which comprises adding to the system a stable emulsion of an aqueous internal phase in a non-aqueous external phase. The aqueous internal phase contains a homo- or a copolymer of an acrylamido alkylene quaternary ammonium salt.
Inventors
- 👤 Harold L. Becker
- 👤 Rudolf S. Buriks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:01
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/016; C; C02; C02F; C02F1/00; C02F1/52; C02F1/54; B03D1/01
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
46 words
A process of treating an aqueous system comprising adding to said system an effective amount of a stable emulsion of an aqueous internal phase in a non-aqueous external phase, said aqueous internal phase containing a homo- or a copolymer of an acrylamido alkylene quaternary ammonium salt.
Claim 2
Dependent Claim
46 words
A process of treating an aqueous system comprising adding to said system an effective amount of a stable emulsion of an aqueous internal phase in a non-aqueous external phase, said aqueous internal phase containing a homo- or a copolymer of an acrylamido alkylene quaternary ammonium salt.
Claim 3
Dependent Claim
11 words
The process of claim 1 where the polymer is a homopolymer.
Claim 4
Dependent Claim
17 words
The process of claim 2 where the homopolymer is derived from N,N-dimethyl n-propyl methacrylamide N-benzyl ammonium chloride.
Claim 5
Dependent Claim
11 words
The process of claim 1 where the polymer is a copolymer.
Claim 6
Dependent Claim
31 words
The process of claim 4 where one of the monomers from which the copolymer in the emulsion is formed is N,N-dimethyl n-propyl methacrylamide N-benzyl ammonium chloride and the comonomer is acrylamide.
Claim 7
Dependent Claim
14 words
The process of claim 1 which is a process of dewatering aqueous waste systems.
Claim 8
Dependent Claim
18 words
The process of claim 1 which is a process for removal of oils and solids from aqueous systems.
Claim 9
Dependent Claim
18 words
The process of claim 7 wherein the amount of the composition added is at least about 0.5 ppm.
Claim 10
Dependent Claim
19 words
The process of claim 7 where the amount of the composition added is from about 1.0 to 60 ppm.
Claim 11
Dependent Claim
19 words
The process of claim 7 where the amount of the composition added is from about 3.0 to 30 ppm.
Claim 12
Dependent Claim
10 words
The process of claim 1 which is a demulsification process.
Claim 13
Dependent Claim
11 words
The process of claim 11 when the demulsification system employs flotation.
Claim 14
Dependent Claim
23 words
The process of claim 11 where the amount of the composition added is from 1/5,000 to 1/500,000 of the volume of emulsion treated.
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) | 1987-06-12 | 1987-12-12 | 1988-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-12 | 1991-12-12 | 1992-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-12 | 1995-12-12 | 1996-06-12 | $7700.00 | Window Closed / Lapsed |