US3028407A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Substituted ethylenediamine compounds having aromatic rings
Assignee: Novartis Corp
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Filing: 1958-04-18
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Granted: 1962-04-03
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Expires: 1978-04-18
Abstract
No abstract record available.
Inventors
- 👤 Knell Martin
- 👤 Kroll Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:19
CPC Classifications
C; C07; C07C; C07C229/00; C07C229/02; C07C229/04; C07C229/24; C07F; C07F7/00; C07F7/003
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
15 words
A MEMBER OF THE CLASS CONSISTING OF (A) A MONOAMIDE HAVING THE INDICATED GENERAL FORMULA
Claim 2
Dependent Claim
15 words
A MEMBER OF THE CLASS CONSISTING OF (A) A MONOAMIDE HAVING THE INDICATED GENERAL FORMULA
Claim 3
Independent Claim
74 words
THE METHOD OF HYDROLYZING AN ETHYLENE BIS(ALPHAIMINO-ORTHO-HYDROXYPHENYL ACETONITRILE) TO ITS CORRESPONDING ETHYLENE BIS(ALPHA-IMINO-ORTHO-HYDROXYPHENYLACETIC ACID)-MONOAMIDE, WHICH METHOD COMPRISES MIXING THER ACETONITRILE IN A CONCENTRATED HYDROHALIDE ACID AND CONTROLLING THE HEATING OF THE REACTION MIXTURE TO AVOID EXCEEDING ABOUT 40*C. WHILE THE ACETONITRILE AND THE ACID ARE BEING ADMIXED, AND THEREAFTER HEATING THE MIXTURE AT BETWEEN ABOUT 40 TO ABOUT 45* FOR THE SEVERAL HOURS SUFFICIENT FOR THE HYDROLYSIS TO THE MONOAMIDE DIHYDROHALIDE TO BE COMPLEATED.
Claim 4
Independent Claim
74 words
THE METHOD OF HYDROLYZING AN ETHYLENE BIS(ALPHAIMINO-ORTHO-HYDROXYPHENYL ACETONITRILE) TO ITS CORRESPONDING ETHYLENE BIS(ALPHA-IMINO-ORTHO-HYDROXYPHENYLACETIC ACID)-MONOAMIDE, WHICH METHOD COMPRISES MIXING THER ACETONITRILE IN A CONCENTRATED HYDROHALIDE ACID AND CONTROLLING THE HEATING OF THE REACTION MIXTURE TO AVOID EXCEEDING ABOUT 40*C. WHILE THE ACETONITRILE AND THE ACID ARE BEING ADMIXED, AND THEREAFTER HEATING THE MIXTURE AT BETWEEN ABOUT 40 TO ABOUT 45* FOR THE SEVERAL HOURS SUFFICIENT FOR THE HYDROLYSIS TO THE MONOAMIDE DIHYDROHALIDE TO BE COMPLEATED.
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) | 1965-04-02 | 1965-10-02 | 1966-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-02 | 1969-10-02 | 1970-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-02 | 1973-10-02 | 1974-04-03 | $7700.00 | Window Closed / Lapsed |