Patent US4440952A successfully refreshed from Google Patents.
US4440952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1-Methyl-2,6-diamino-3-isopropyl benzene
Assignee: Ethyl Corp
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Filing: 1982-09-29
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Granted: 1984-04-03
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Expires: 2002-09-29
Abstract
Abstract A process for monoalkylating 1-alkyl-2,4-diaminobenzene or 1-alkyl-2,6-diaminobenzene. Propylene is reacted with 2,4-diaminotoluene in the presence of aluminum anilide catalyst. Aniline is an optional ingredient. 1-Methyl-2,6-diamino-3-isopropylbenzene is a new compound: ##STR1##
Inventors
- 👤 Kryn G. Ihrman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:22
CPC Classifications
C; C07; C07C; C07C209/00; C07C209/68
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
4 words
The compound 1-methyl-2,6-diamino-3-isopropylbenzene: ##STR5##
Claim 2
Dependent Claim
4 words
The compound 1-methyl-2,6-diamino-3-isopropylbenzene: ##STR5##
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-04-03 | 1987-10-03 | 1988-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-03 | 1991-10-03 | 1992-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-03 | 1995-10-03 | 1996-04-03 | $7700.00 | Window Closed / Lapsed |