US4505839A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyalkanolamines
Assignee: Baker Petrolite LLC
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Filing: 1981-05-18
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Granted: 1985-03-19
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Expires: 2001-05-18
Abstract
Abstract Polyalkanolamines of controlled molecular weights and their uses as demulsifiers and/or flotation agents.
Inventors
- 👤 Thomas J. Bellos
- 👤 Eva G. Lovett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:09
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/02; C08G73/0206; C08G73/0213; C08G73/0226; B; B01; B01D; B01D17/00; B01D17/02; B01D17/04; B01D17/047; C02; C02F; C02F1/00; C02F1/24; C02F2101/00; C02F2101/30; C02F2101/32
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
69 words
Compositions comprising quaternaries of polyalkanolamines which have an osmometer molecular weight of from about 325 to 525 and a viscosity of about 65 to 150 SUS when measured at 50% aqueous solution at 100° F., produced by the zinc chloride/acetic acid or aluminum sulfate/acetic acid catalyzed polymerization of alkanolamines, said quaternaries produced by the further reaction of said polyalkanolamines with an alkyl halide having 1 to 18 carbon atoms.
Claim 2
Dependent Claim
69 words
Compositions comprising quaternaries of polyalkanolamines which have an osmometer molecular weight of from about 325 to 525 and a viscosity of about 65 to 150 SUS when measured at 50% aqueous solution at 100° F., produced by the zinc chloride/acetic acid or aluminum sulfate/acetic acid catalyzed polymerization of alkanolamines, said quaternaries produced by the further reaction of said polyalkanolamines with an alkyl halide having 1 to 18 carbon atoms.
Claim 3
Dependent Claim
18 words
The compositions of claim 1 where the alkanolamines used to prepare the polyalkanolamine is triethanol amine and/or N,N-bis(2-hydroxyethyl)-N-hydroxypropylamine.
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) | 1988-03-18 | 1988-09-17 | 1989-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-18 | 1992-09-17 | 1993-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-18 | 1996-09-17 | 1997-03-19 | $7700.00 | Window Closed / Lapsed |