US2648685A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of carboxylic acid amides
Assignee: Individual
•
Filing: 1950-02-09
•
Granted: 1953-08-11
•
Expires: 1970-02-09
Abstract
No abstract record available.
Inventors
- 👤 Reppe Walter
- 👤 Magin August
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:26
CPC Classifications
C; C07; C07C; C07C233/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
62 words
A PROCESS FOR THE PRODUCTION OF CARBOXYLIC ACID AMIDES WHICH COMPRISES REACTING AN OLEFINIC COMPOUND WITH CARBON MONOXIDE AND AN AMINATING COMPOUND FROM THE GROUP CONSISTING OF AMMONIA, PRIMARY AMINES AND SECONDARY AMINES IN THE PRESENCE OF A CYANIDE OF A METAL CAPABLE OF FORMING METAL CARBONYLS, AT A TEMPERATURE BETWEEN 100* C. AND 200* C. AND A PRESSURE EXCEEDING 20 ATMOSPHERES.
Claim 2
Dependent Claim
62 words
A PROCESS FOR THE PRODUCTION OF CARBOXYLIC ACID AMIDES WHICH COMPRISES REACTING AN OLEFINIC COMPOUND WITH CARBON MONOXIDE AND AN AMINATING COMPOUND FROM THE GROUP CONSISTING OF AMMONIA, PRIMARY AMINES AND SECONDARY AMINES IN THE PRESENCE OF A CYANIDE OF A METAL CAPABLE OF FORMING METAL CARBONYLS, AT A TEMPERATURE BETWEEN 100* C. AND 200* C. AND A PRESSURE EXCEEDING 20 ATMOSPHERES.
Claim 3
Dependent Claim
69 words
A PROCESS FOR THE PRODUCTION OF TETRAHYDROFURANE CARBOXYLIC ACID AMIDE WHICH COMPRISES RE ACTING ABOUT 500 GRAMS OF DIHYDROFURANE WITH CARBON MONOXIDE AND ABOUT 400 GRAMS OF WATER, 600 GRAMS OF METHANOL AND ABOUT 190 GRAMS OF ANHYDROUS AMMONIA IN THE PRESENCE OF ABOUT 71 GRAMS OF NICKEL CYANIDE, HEATING THE MIXTURE TO ABOUT 135* C. AND ADDING CARBON MONOXIDE TO MAINTAIN A TOTAL PRESSURE OF ABOUT 70 ATMOSPHERES.
Claim 4
Dependent Claim
69 words
A PROCESS FOR THE PRODUCTION OF TETRAHYDROFURANE CARBOXYLIC ACID AMIDE WHICH COMPRISES RE ACTING ABOUT 500 GRAMS OF DIHYDROFURANE WITH CARBON MONOXIDE AND ABOUT 400 GRAMS OF WATER, 600 GRAMS OF METHANOL AND ABOUT 190 GRAMS OF ANHYDROUS AMMONIA IN THE PRESENCE OF ABOUT 71 GRAMS OF NICKEL CYANIDE, HEATING THE MIXTURE TO ABOUT 135* C. AND ADDING CARBON MONOXIDE TO MAINTAIN A TOTAL PRESSURE OF ABOUT 70 ATMOSPHERES.
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) | 1956-08-10 | 1957-02-09 | 1957-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-10 | 1961-02-09 | 1961-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-10 | 1965-02-09 | 1965-08-11 | $7700.00 | Window Closed / Lapsed |