US4383926A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of demulsifying and/or clarifying aqueous systems with azetidinium polymers
Assignee: Baker Petrolite LLC
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Filing: 1982-01-15
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Granted: 1983-05-17
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Expires: 2002-01-15
Abstract
Abstract This invention relates to N,N-diallyl-3-hydroxy azetidinium salts, homo- and co-polymers thereof; and the preparation thereof. This invention also relates to the use of the above polymers as demulsifiers.
Inventors
- 👤 Rudolf S. Buriks
- 👤 Eva G. Lovett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:02
CPC Classifications
B; B01; B01D; B01D17/00; B01D17/02; B01D17/04; B01D17/047; C; C08; C08F; C08F26/00; C08F26/02; C10; C10G; C10G33/00; C10G33/04
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
41 words
A process of demulsifying and/or clarifying aqueous systems which comprises treating oil-in-water emulsions with homo and copolymers of N,N-diallyl-3-hydroxy azetidinium halide, formed under free radical conditions where, in the copolymers, one of the monomers of the copolymer is a vinyl monomer.
Claim 2
Dependent Claim
41 words
A process of demulsifying and/or clarifying aqueous systems which comprises treating oil-in-water emulsions with homo and copolymers of N,N-diallyl-3-hydroxy azetidinium halide, formed under free radical conditions where, in the copolymers, one of the monomers of the copolymer is a vinyl monomer.
Claim 3
Dependent Claim
19 words
The process of claim 1 where the azetidinium halide polymer or copolymer is an azetidinium chloride polymer or copolymer.
Claim 4
Dependent Claim
11 words
The process of claim 1 where the vinyl monomer is acrylamide.
Claim 5
Dependent Claim
11 words
The process of claim 2 where the vinyl monomer is acrylamide.
References Cited (Backward Citations)
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Cited
US2865960A
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US3412019A
Cited
US3585148A
Cited
US3686151A
Cited
US4077930A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-05-16 | 1986-11-15 | 1987-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-16 | 1990-11-15 | 1991-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-16 | 1994-11-15 | 1995-05-17 | $7700.00 | Window Closed / Lapsed |