US2622078A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of diazotizing aromatic amino-compounds to corresponding diazonium compounds
Assignee: Hartford National Bank and Trust Co
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Filing: 1948-12-08
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Granted: 1952-12-16
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Expires: 1968-12-08
Abstract
No abstract record available.
Inventors
- 👤 Klaassens Klaas Hinderikus
- 👤 Schoot Cornelis Johannes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:27
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/52; G03C1/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
A MEHOD OF DIAZOTIZING AN AMINO AROMATIC SULPHONIC ACID TO THE CORRESPONDING DIAZONIUM COMPOUND WHICH COMPRISES SUBJECTING THE SAID AMINO AROMATIC SULPHONIC ACID COMPOUND TO THE ACTION OF NITROUS ACID IN THE PRESENCE OF A KETONE SELECTED FROM THE GROUP CONSISTING OF ACETONE AND BUTANONE AT A TEMPERATURE OF ABOUT 20* TO 56* C. TO THEREBY DIAZOTIZE THE SAID AROMATIC ACID AMINO COMPOUND TO THE CORRESPONDING DIAZONIUM COMPOUND.
Claim 2
Dependent Claim
68 words
A MEHOD OF DIAZOTIZING AN AMINO AROMATIC SULPHONIC ACID TO THE CORRESPONDING DIAZONIUM COMPOUND WHICH COMPRISES SUBJECTING THE SAID AMINO AROMATIC SULPHONIC ACID COMPOUND TO THE ACTION OF NITROUS ACID IN THE PRESENCE OF A KETONE SELECTED FROM THE GROUP CONSISTING OF ACETONE AND BUTANONE AT A TEMPERATURE OF ABOUT 20* TO 56* C. TO THEREBY DIAZOTIZE THE SAID AROMATIC ACID AMINO COMPOUND TO THE CORRESPONDING DIAZONIUM COMPOUND.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-16 | 1956-06-16 | 1956-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-16 | 1960-06-16 | 1960-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-16 | 1964-06-16 | 1964-12-16 | $7700.00 | Window Closed / Lapsed |