US3872096A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2-aminoalkyl-substituted cyclic imido esters and process for the preparation thereof
Assignee: Huels AG
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Filing: 1973-04-25
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Granted: 1975-03-18
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Expires: 1993-04-25
Abstract
Abstract 2-Aminoalkyl substituted cyclic imido esters, useful as intermediates and corrosion inhibitors, of the formula WHEREIN R is H or CH3, with an appropriate alkanolamine. WHEREIN Alk is ethylene, propylene or trimethylene and Alk'' is ethylene or propylene, are prepared by reacting a nitrile of one of the formulae
Inventors
- 👤 Helmut Witte
- 👤 Wolfgang Seeliger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:22
CPC Classifications
C; C07; C07D; C07D263/00; C07D263/02; C07D263/08; C07D263/10; C07D265/00; C07D265/04; C07D265/06; C07D265/08
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
10 words
A 2-AMINOALKYL-SUBSTITUTED CYCLIC IMIDO ESTER OF ONE OF THE FORMULAE
Claim 2
Dependent Claim
10 words
A 2-AMINOALKYL-SUBSTITUTED CYCLIC IMIDO ESTER OF ONE OF THE FORMULAE
Claim 3
Dependent Claim
8 words
The compound of claim 1 of the formula
Claim 4
Dependent Claim
8 words
The compound of claim 1 of the formula
Claim 5
Dependent Claim
8 words
The compound of claim 1 of the formula
Claim 6
Dependent Claim
8 words
The compound of claim 1 of the formula
References Cited (Backward Citations)
US2579478A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |