Some of the information on this Web page has been provided by external sources. The Government of Canada is not responsible for the accuracy, reliability or currency of the information supplied by external sources. Users wishing to rely upon this information should consult directly with the source of the information. Content provided by external sources is not subject to official languages, privacy and accessibility requirements.
Any discrepancies in the text and image of the Claims and Abstract are due to differing posting times. Text of the Claims and Abstract are posted:
(12) Patent: | (11) CA 1048540 |
---|---|
(21) Application Number: | 1048540 |
(54) English Title: | 4-CHLORO-5-OXO-HEXANOIC ACID NITRILE, 6-CHLORO-5-OXO-HEXANOIC ACID NITRILE AND PROCESS FOR THEIR MANUFACTURE |
(54) French Title: | NITRILE D'ACIDE CHLORO-4 OXO-5 HEXANOIQUE ET D'ACIDE CHLORO-6 OXO-5 HEXANOIQUE |
Status: | Term Expired - Post Grant Beyond Limit |
(51) International Patent Classification (IPC): |
|
---|---|
(72) Inventors : | |
(73) Owners : |
|
(71) Applicants : |
|
(74) Agent: | |
(74) Associate agent: | |
(45) Issued: | 1979-02-13 |
(22) Filed Date: | |
Availability of licence: | N/A |
Dedicated to the Public: | N/A |
(25) Language of filing: | English |
Patent Cooperation Treaty (PCT): | No |
---|
(30) Application Priority Data: | None |
---|
4-CHLORO-5-OXO-HEXANOIC ACID NITRILE,
6-CHLORO-5-OXO-HEXANOIC ACID NITRILE
AND PROCESS FOR THEIR MANUFACTURE
Abstract of the disclosure:
The compounds 4-chloro-5-oxo-hexanoic acid nitrile and
6-chloro-5-oxo-hexanoic acid nitrile are prepared by chlori-
nating 5-oxo-hexanoic acid nitrile in an aqueous 20 to 40%
solution at temperatures of from 25 to 55°C, separating the
precipitating oily second phase and submitting it to distil-
lation. Said compounds are valuable starting products for
preparing ?- or .epsilon. -amino acids and important synthesis pro-
ducts for preparing heterocyclic compounds.
Note: Claims are shown in the official language in which they were submitted.
Note: Descriptions are shown in the official language in which they were submitted.
Sorry, the representative drawing for patent document number 1048540 was not found.
2024-08-01:As part of the Next Generation Patents (NGP) transition, the Canadian Patents Database (CPD) now contains a more detailed Event History, which replicates the Event Log of our new back-office solution.
Please note that "Inactive:" events refers to events no longer in use in our new back-office solution.
For a clearer understanding of the status of the application/patent presented on this page, the site Disclaimer , as well as the definitions for Patent , Event History , Maintenance Fee and Payment History should be consulted.
Description | Date |
---|---|
Inactive: IPC assigned | 2012-10-19 |
Inactive: First IPC assigned | 2012-10-19 |
Inactive: IPC assigned | 2012-10-19 |
Inactive: Expired (old Act Patent) latest possible expiry date | 1996-02-13 |
Inactive: IPC removed | 1989-12-31 |
Inactive: IPC removed | 1989-12-31 |
Grant by Issuance | 1979-02-13 |
There is no abandonment history.
Note: Records showing the ownership history in alphabetical order.
Current Owners on Record |
---|
HOECHST AKTIENGESELLSCHAFT |
Past Owners on Record |
---|
None |