Patent US1738843A successfully refreshed from Google Patents.
Patent US2769000A successfully refreshed from Google Patents.
US2769000A
Expired / Lapsed
US
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Preparation of amides and lactams
Assignee: MIJ VOOR KOLENBEIWERKING STAMI
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Filing: 1952-04-01
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Granted: 1956-10-30
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Expires: 1972-04-01
Abstract
No abstract record available.
Inventors
- 👤 Dirk W Van Krevelen
- 👤 Gelder Arthur L De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:48
CPC Classifications
C; C07; C07D; C07D201/00; C07D201/02; C07D201/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
A PROCESS FOR THE PREPARATION OF SUBSTITUTED CARBONAMIDES FROM OXIMES WHICH COMPRISES INTRODUCING THE OXIME AXIALLY INTO A RADIALLY SYMMETRICAL CHAMBER IN WHICH A STRONG CYCLONIC CURRENT HAS BEEN GENERATED BY FORCING TANGENTIALLY INTO THE CHAMBER A LIQUID CONTAINING A CATALYST FOR THE AFOREMENTIONED CONVERSION, CONVERTING SAID OXIME TO SAID CARBONAMIDE IN THE PRESENCE OF SAID CYCLONIC CURRENT AND DISCHARGING THE MIXTURE SO PRODUCED AXIALLY FROM THE SAID CHAMBER THROUGH A CENTRALLY ARRANGED DISCHARGE APERATURE.
Claim 2
Dependent Claim
75 words
A PROCESS FOR THE PREPARATION OF SUBSTITUTED CARBONAMIDES FROM OXIMES WHICH COMPRISES INTRODUCING THE OXIME AXIALLY INTO A RADIALLY SYMMETRICAL CHAMBER IN WHICH A STRONG CYCLONIC CURRENT HAS BEEN GENERATED BY FORCING TANGENTIALLY INTO THE CHAMBER A LIQUID CONTAINING A CATALYST FOR THE AFOREMENTIONED CONVERSION, CONVERTING SAID OXIME TO SAID CARBONAMIDE IN THE PRESENCE OF SAID CYCLONIC CURRENT AND DISCHARGING THE MIXTURE SO PRODUCED AXIALLY FROM THE SAID CHAMBER THROUGH A CENTRALLY ARRANGED DISCHARGE APERATURE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-30 | 1960-04-30 | 1960-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-30 | 1964-04-30 | 1964-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-30 | 1968-04-30 | 1968-10-30 | $7700.00 | Window Closed / Lapsed |