Patent US2784191A successfully refreshed from Google Patents.
US2784191A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of lactams
Assignee: —
•
Filing: —
•
Granted: 1957-03-05
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Expires: 1974-03-05
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:18
CPC Classifications
C; C07; C07D; C07D211/00; C07D211/04; C07D211/68; C07D211/72; C07D211/74; C07D211/76; C07D201/00; C07D201/02; C07D201/08; C07D201/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
A PROCESS FOR THE PREPARATION OF LACTAMS, WHICH COMPRISES REACTING A MEMBER OF THE GROUP CONSISTING OF W-CHLORINE AND W-BROMINE SUBSTITUTED FATTY ACID CONTIANING FROM 4 TO 7 CARBON ATOMS IN THE CHAIN WITH AMMONIUM HYDROXIDE AT ELEVATED TEMPERATURE AND PRESSURES, AND RECOVERING THE LACTAM THUS FORMED FROM THE REACTION MIXTURE.
Claim 2
Dependent Claim
51 words
A PROCESS FOR THE PREPARATION OF LACTAMS, WHICH COMPRISES REACTING A MEMBER OF THE GROUP CONSISTING OF W-CHLORINE AND W-BROMINE SUBSTITUTED FATTY ACID CONTIANING FROM 4 TO 7 CARBON ATOMS IN THE CHAIN WITH AMMONIUM HYDROXIDE AT ELEVATED TEMPERATURE AND PRESSURES, AND RECOVERING THE LACTAM THUS FORMED FROM THE REACTION MIXTURE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-03-04 | 1960-09-03 | 1961-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-04 | 1964-09-03 | 1965-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-04 | 1968-09-03 | 1969-03-05 | $7700.00 | Window Closed / Lapsed |