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Patent US2823202A successfully refreshed from Google Patents.
US2823202A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of monochloroazobenzenes
Assignee: Wyeth Holdings LLC
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Filing: 1954-06-18
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Granted: 1958-02-11
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Expires: 1974-06-18
Abstract
No abstract record available.
Inventors
- 👤 Jack H Thelin
- 👤 Cherlow Herman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:27
CPC Classifications
C; C09; C09B; C09B27/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
THE PROCESS OF PRODUCING MONOCHLORROAZOBENZENE WHICH COMPRISES REACTING MONOCHLORONITROBENZENE WITH ANILINE IN THE PRESENCE OF AN ALKALI METAL HYDROXIDE UNDER ANHYDROUS CONDITIONS AT A TEMPERATURE OF ABOUT 160 TO 185*C., THE ANILINE AND ALKALI METAL HYDROXIDE BEING PRESENT IN AT LEAST STOICHIOMETRIC QUANTITIES.
Claim 2
Dependent Claim
43 words
THE PROCESS OF PRODUCING MONOCHLORROAZOBENZENE WHICH COMPRISES REACTING MONOCHLORONITROBENZENE WITH ANILINE IN THE PRESENCE OF AN ALKALI METAL HYDROXIDE UNDER ANHYDROUS CONDITIONS AT A TEMPERATURE OF ABOUT 160 TO 185*C., THE ANILINE AND ALKALI METAL HYDROXIDE BEING PRESENT IN AT LEAST STOICHIOMETRIC QUANTITIES.
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) | 1961-02-10 | 1961-08-12 | 1962-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-10 | 1965-08-12 | 1966-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-10 | 1969-08-12 | 1970-02-11 | $7700.00 | Window Closed / Lapsed |