Patent US3153048A successfully refreshed from Google Patents.
US3153048A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for production of 2-(aminophenyl)-2, 1, 3-benzotriazole
Assignee: EIDP Inc
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Filing: 1962-07-20
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Granted: 1964-10-13
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Expires: 1982-07-20
Abstract
No abstract record available.
Inventors
- 👤 Donald N Thatcher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:23
CPC Classifications
C; C07; C07D; C07D249/00; C07D249/16; C07D249/18; C07D249/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A PROCESS FOR THE PREPARATION OF 2-(O-AMINOPHENYL)2,1,3-BENZOTRIAZOLE WHICH COMPRISES: (A) CONTACTING, IN AN AQUEOUS SOLUTION OF A SALT OF THE GROUP CONSISTING OF AMMONIUM CHLORIDE, CALCIUM CHLORIDE, AND DIMETHYLAMMONIUM CHLORIDE, O-NITROACETANILIDE WITH A FINELY DIVIDED METAL SELECTED FROM THE GROUP CONSISTING OF ZINC AND MAGNESIUM TO FORM AN O-HYDROXYLAMINOACETANILIDE SOLUTION, (B) MIXING SAID AQUEOUS SOLUTION OF /-HYDROXYLAMINOACETANILIDE WITH O-NITORSOACETANILIDE TO FORM O,O'',-DIACETAMIDOAZOXYBENZENE, (C) HEATING SAID O,O''-DIACETAMIDOAZOXYBNEZENE WITH STRONG SULFUR-FREE MINERAL ACID TO FORM THE ACID SALT OF O,O''-IDAMINOAZOXYBENZENE, (D) CONTACTING SAID ACID SALT WITH BASE TO FORM O,O'' DIAMINOAZOXYBENZENE, AND (E) HEATING SAID O,O''-DIAMINOAZOYLBENZENE IN THE PRESENCE OF POLYPHOSPHORIC ACID.
Claim 2
Dependent Claim
100 words
A PROCESS FOR THE PREPARATION OF 2-(O-AMINOPHENYL)2,1,3-BENZOTRIAZOLE WHICH COMPRISES: (A) CONTACTING, IN AN AQUEOUS SOLUTION OF A SALT OF THE GROUP CONSISTING OF AMMONIUM CHLORIDE, CALCIUM CHLORIDE, AND DIMETHYLAMMONIUM CHLORIDE, O-NITROACETANILIDE WITH A FINELY DIVIDED METAL SELECTED FROM THE GROUP CONSISTING OF ZINC AND MAGNESIUM TO FORM AN O-HYDROXYLAMINOACETANILIDE SOLUTION, (B) MIXING SAID AQUEOUS SOLUTION OF /-HYDROXYLAMINOACETANILIDE WITH O-NITORSOACETANILIDE TO FORM O,O'',-DIACETAMIDOAZOXYBENZENE, (C) HEATING SAID O,O''-DIACETAMIDOAZOXYBNEZENE WITH STRONG SULFUR-FREE MINERAL ACID TO FORM THE ACID SALT OF O,O''-IDAMINOAZOXYBENZENE, (D) CONTACTING SAID ACID SALT WITH BASE TO FORM O,O'' DIAMINOAZOXYBENZENE, AND (E) HEATING SAID O,O''-DIAMINOAZOYLBENZENE IN THE PRESENCE OF POLYPHOSPHORIC ACID.
References Cited (Backward Citations)
US2458214A
Cited
US2985661A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-10-13 | 1968-04-13 | 1968-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-13 | 1972-04-13 | 1972-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-13 | 1976-04-13 | 1976-10-13 | $7700.00 | Window Closed / Lapsed |