US4057554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quaternary ammonium salts of polyepihalohydrin
Assignee: Baker Petrolite LLC
•
Filing: 1975-03-10
•
Granted: 1977-11-08
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Expires: 1995-03-10
Abstract
Abstract Quaternary ammonium salts of polyepihalohydrin and tertiary amines and their use as corrosion inhibitors, particularly in acid systems.
Inventors
- 👤 Derek Redmore
- 👤 Frederick T. Welge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:49
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/02; C23G1/04; C23G1/06; C23G1/063; C08; C08G; C08G65/00; C08G65/02; C08G65/32; C08G65/329; C08G65/333; C08G65/33303; C23F; C23F11/00; C23F11/04; Y; Y10; Y10S; Y10S507/00; Y10S507/933; Y10S507/934
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
69 words
Polyquaternaries of polyepichlorohydrins and tertiary amine where the polyquaternary contains both heterocyclic and aliphatic tertiary amines and is formed by the quaternization of the polyepichlorohydrin with about one mol of a mixture of about 1/4 to 1/2 mol of an aliphatic tertiary amine and correspondingly about 3/4 to 1/2 mol of a heterocyclic amine which is pyridine, quinoline, isoquinoline, alkyl derivatives thereof or mixtures thereof per equivalent of polyepichlorohydrin.
Claim 2
Dependent Claim
69 words
Polyquaternaries of polyepichlorohydrins and tertiary amine where the polyquaternary contains both heterocyclic and aliphatic tertiary amines and is formed by the quaternization of the polyepichlorohydrin with about one mol of a mixture of about 1/4 to 1/2 mol of an aliphatic tertiary amine and correspondingly about 3/4 to 1/2 mol of a heterocyclic amine which is pyridine, quinoline, isoquinoline, alkyl derivatives thereof or mixtures thereof per equivalent of polyepichlorohydrin.
Claim 3
Dependent Claim
15 words
The polyquaternaries of claim 1 where the polyepichlorohydrin has from 3 to 150 ##STR10## units.
Claim 4
Dependent Claim
19 words
The polyquaternary of claim 2 where the heterocyclic tertiary amine is pyridine, an alkyl pyridine, or a mixture thereof.
Claim 5
Dependent Claim
13 words
The polyquaternaries of claim 3 where the polyepichlorohydrin contains 6 to 20 units.
Claim 6
Dependent Claim
13 words
The polyquaternaries of claim 4 where the aliphatic tertiary amine is an alkanolamine.
Claim 7
Dependent Claim
29 words
The polyquaternaries of claim 5 where the mixture is a mixture of 1/4 mol of triethanolamine and 3/4 mol of pyridine and the polyepichlorohydrin is of molecular weight 1250.
Claim 8
Dependent Claim
34 words
The polyquaternaries of claim 5 where the mixture is a mixture of 1/4 mol of triethanolamine and 3/4 mol of a mixture of 2- and 4-picoline and the polyepichlorohydrin is of molecular weight 1250.
References Cited (Backward Citations)
US2483749A
Cited
US3320317A
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US3428680A
Cited
US3625684A
Cited
GB1275184A
Cited
US3640766A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-11-07 | 1981-05-09 | 1981-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-07 | 1985-05-09 | 1985-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-07 | 1989-05-09 | 1989-11-08 | $7700.00 | Window Closed / Lapsed |