Patent US2846382A successfully refreshed from Google Patents.
US2846382A
Expired / Lapsed
US
⏱️ 0.0 years remaining
New process for the preparation of amines
Assignee: CIBA PHARMACENTICAL PRODUCTS I
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Filing: 1955-07-25
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Granted: 1958-08-05
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Expires: 1975-07-25
Abstract
No abstract record available.
Inventors
- 👤 Allen Milton Joel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:21
CPC Classifications
C; C07; C07D; C07D209/00; C07D209/02; C07D209/44; C07D209/48; C07D209/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A PROCESS FOR THE PREPARATION OF N-AMINOALKYL3,4,5,6-TETRACHLOROISOINDOLINES, WHICH COMPRISES ELECTROLYTICALLY REDUCING N-AMINOALKYL-3,4,5,6-TETRACHLOROPHTHALIMIDES AT A CATHODIC REFERENCE POTENTIAL OF AT LEAST -1.0 VOLT VS. A SATURATED CALOMEL ELECTRODE, USING AN AQUEOUS CATHOLYTE CONSISTING ESSENTIALLY OF WATER, A LOWER ALIPHATIC CARBOXYLIC ACID SELECTED FROM THE GROUP CONSISTING OF ACETIC ACID PROPIONIC ACID AND N-BUTYRIC ACID AND A STRONG INORGANIC ACID SELECTED FROM THE GROUP CONSISTING OF PHOSPHORIC ACID, HYDROCHLORIC ACID AND SULFURIC ACID AND A CATHODE OF HIGH OVERVOLTAGE.
Claim 2
Dependent Claim
77 words
A PROCESS FOR THE PREPARATION OF N-AMINOALKYL3,4,5,6-TETRACHLOROISOINDOLINES, WHICH COMPRISES ELECTROLYTICALLY REDUCING N-AMINOALKYL-3,4,5,6-TETRACHLOROPHTHALIMIDES AT A CATHODIC REFERENCE POTENTIAL OF AT LEAST -1.0 VOLT VS. A SATURATED CALOMEL ELECTRODE, USING AN AQUEOUS CATHOLYTE CONSISTING ESSENTIALLY OF WATER, A LOWER ALIPHATIC CARBOXYLIC ACID SELECTED FROM THE GROUP CONSISTING OF ACETIC ACID PROPIONIC ACID AND N-BUTYRIC ACID AND A STRONG INORGANIC ACID SELECTED FROM THE GROUP CONSISTING OF PHOSPHORIC ACID, HYDROCHLORIC ACID AND SULFURIC ACID AND A CATHODE OF HIGH OVERVOLTAGE.
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) | 1961-08-04 | 1962-02-03 | 1962-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-04 | 1966-02-03 | 1966-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-04 | 1970-02-03 | 1970-08-05 | $7700.00 | Window Closed / Lapsed |