Patent US2800497A successfully refreshed from Google Patents.
US2800497A
Expired / Lapsed
US
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Method of manufacturing omegachlorocarboxylic acid nitriles
Assignee: Glanzstoff AG
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Filing: 1955-03-04
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Granted: 1957-07-23
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Expires: 1975-03-04
Abstract
No abstract record available.
Inventors
- 👤 Indest Heinz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:49
CPC Classifications
C; C07; C07C; C07C253/00; C07C253/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
METHOD OF MANUFACTURING ALIPHATIC OMEGA CHLOROCARBOXYLIC ACID NITRILES OF THE GENERAL FORMULA C1.(CH2)N.CN WHEREIN N IS A CARDINAL NUMBER IN THE SERIES 4 TO 11 WHICH COMPRISES REACTING AN OMEGA, OMEGA''DICHLOROPARAFFIN OF THE GENERAL FORMULA C1.(CH2)N.C1 WHEREIN N HAS THE SIGNIFICANT ABOVE DEFINED WITH AN ALKALI METAL SALT OF HYDROCYANIC ACID IN A MEDIUM OF WATER AND ALCOHOL WHICH IS AT LEAST PARTIALLY MISCIBLE WITH WATER AT A TEMPERATURE OF FROM 70*C. TO 100*C., THE MOLAR RATIO OF THE CYANIDE TO THE DICHLOROPARAFFIN BEING APPROXIMATELY 0.8 TO 1.2:1, THE REACTION TIME BEING ABOUT 3 TO 4 HOURSS.
Claim 2
Dependent Claim
97 words
METHOD OF MANUFACTURING ALIPHATIC OMEGA CHLOROCARBOXYLIC ACID NITRILES OF THE GENERAL FORMULA C1.(CH2)N.CN WHEREIN N IS A CARDINAL NUMBER IN THE SERIES 4 TO 11 WHICH COMPRISES REACTING AN OMEGA, OMEGA''DICHLOROPARAFFIN OF THE GENERAL FORMULA C1.(CH2)N.C1 WHEREIN N HAS THE SIGNIFICANT ABOVE DEFINED WITH AN ALKALI METAL SALT OF HYDROCYANIC ACID IN A MEDIUM OF WATER AND ALCOHOL WHICH IS AT LEAST PARTIALLY MISCIBLE WITH WATER AT A TEMPERATURE OF FROM 70*C. TO 100*C., THE MOLAR RATIO OF THE CYANIDE TO THE DICHLOROPARAFFIN BEING APPROXIMATELY 0.8 TO 1.2:1, THE REACTION TIME BEING ABOUT 3 TO 4 HOURSS.
References Cited (Backward Citations)
US2425426A
Cited
US2415261A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-22 | 1961-01-21 | 1961-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-22 | 1965-01-21 | 1965-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-22 | 1969-01-21 | 1969-07-23 | $7700.00 | Window Closed / Lapsed |