US3960865A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mono or bis 3-(polypropyl or butyl-propenyl)-amino alkyl piperazines
Assignee: Ethyl Corp
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Filing: 1975-04-17
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Granted: 1976-06-01
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Expires: 1995-04-17
Abstract
Abstract Title compounds are novel oil-soluble, detergent-dispersant addition products for crankcase lubricating oils and are prepared by reacting a primary or secondary amine with 1-chloro-2-methylpropenyl substituted alkane hydrocarbons, especially 1-chloro-2-methylpropenyl terminated butene polymers, having a total of 20 to 180 carbon atoms.
Inventors
- 👤 George S. Culbertson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:38
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/30; C08F8/32
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
62 words
An N-hydrocarbyl-substituted bis-(aminoalkyl) piperazine product having the formula ##EQU11## wherein m is an integer from 1 to 10, Z is ##EQU12## wherein R' is hydrogen or methyl and R consists of propyl or butyl units and the total carbon content of Z is in the range from about 25 to about 180 carbon atoms and wherein Z 1 is hydrogen or Z.
Claim 2
Dependent Claim
62 words
An N-hydrocarbyl-substituted bis-(aminoalkyl) piperazine product having the formula ##EQU11## wherein m is an integer from 1 to 10, Z is ##EQU12## wherein R' is hydrogen or methyl and R consists of propyl or butyl units and the total carbon content of Z is in the range from about 25 to about 180 carbon atoms and wherein Z 1 is hydrogen or Z.
Claim 3
Dependent Claim
20 words
The product of claim 1 wherein R' is methyl and R has from about 5 to about 44 butyl units.
Claim 4
Dependent Claim
18 words
The N,N'-disubstituted N 1 , N 4 -bis(aminopropyl) piperazine of the formula ##EQU13## wherein each Z is ##EQU14##
Claim 5
Dependent Claim
18 words
The N,N'-disubstituted N 1 , N 4 -bis(aminopropyl) piperazine of the formula ##EQU13## wherein each Z is ##EQU14##
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-01 | 1979-12-01 | 1980-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-01 | 1983-12-01 | 1984-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-01 | 1987-12-01 | 1988-06-01 | $7700.00 | Window Closed / Lapsed |