US2684976A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nu-mu-chlorophenylformimidic acid esters and process of preparation
Assignee: GAF Chemicals Corp
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Filing: 1951-12-31
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Granted: 1954-07-27
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Expires: 1971-12-31
Abstract
No abstract record available.
Inventors
- 👤 Samuel A Glickman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:35
CPC Classifications
C; C07; C07D; C07D239/00; C07D239/02; C07D239/24; C07D239/28; C07D239/46; C07D239/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
THE PROCESS OF PREPARING LOWER ALKYL N-MEHLOROPHENYLFORMIMIDATES WHICH COMPRISES REACTING AT REFLUX TEMPERATURE, 1 MOL OF M-CHLOROANILINE WITH 1 MOL IN EXCESS OF 0.25 TO 1 MOL OF A LOWER ALKYL ORTHOFORMATE IN THE PRESENCE OF 0.4 MOL PER CENT OF AN ORGANIC SULFONIC ACID AS A CATALYST, REMOVING A LOWER ALKYL ALCOHOL FORMED DURING THE REACTION AND HEATING THE RESIDUAL REACTION PRODUCT AT REDUCED PRESSURE TO DISTILL OFF THE LOWER ALKYL N-M-CHLOROPHENYLFORMIMIDATE.
Claim 2
Dependent Claim
73 words
THE PROCESS OF PREPARING LOWER ALKYL N-MEHLOROPHENYLFORMIMIDATES WHICH COMPRISES REACTING AT REFLUX TEMPERATURE, 1 MOL OF M-CHLOROANILINE WITH 1 MOL IN EXCESS OF 0.25 TO 1 MOL OF A LOWER ALKYL ORTHOFORMATE IN THE PRESENCE OF 0.4 MOL PER CENT OF AN ORGANIC SULFONIC ACID AS A CATALYST, REMOVING A LOWER ALKYL ALCOHOL FORMED DURING THE REACTION AND HEATING THE RESIDUAL REACTION PRODUCT AT REDUCED PRESSURE TO DISTILL OFF THE LOWER ALKYL N-M-CHLOROPHENYLFORMIMIDATE.
References Cited (Backward Citations)
US2504896A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-07-26 | 1958-01-25 | 1958-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-26 | 1962-01-25 | 1962-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-26 | 1966-01-25 | 1966-07-27 | $7700.00 | Window Closed / Lapsed |