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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 540821 |
|---|---|
| (21) Application Number: | 540821 |
| (54) English Title: | ALUMINUM ALLOY |
| (54) French Title: | ALLIAGE D'ALUMINIUM |
| Status: | Term Expired - Post Grant Beyond Limit |
| (51) International Patent Classification (IPC): |
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|---|---|
| (72) Inventors : |
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| (73) Owners : |
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| (71) Applicants : | |
| (74) Agent: | |
| (74) Associate agent: | |
| (45) Issued: | 1957-05-14 |
| (22) Filed Date: | |
| Availability of licence: | N/A |
| Dedicated to the Public: | N/A |
| (25) Language of filing: | English |
| Patent Cooperation Treaty (PCT): | No |
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| (30) Application Priority Data: | None |
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Sorry, the abstracts for patent document number 540821 were not found.
Note: Claims are shown in the official language in which they were submitted.
Sorry, the claims for patent document number 540821 were not found.
Text is not available for all patent documents. The current dates of coverage are on the
Currency of Information
page
Note: Descriptions are shown in the official language in which they were submitted.
Sorry, the description for patent document number 540821 was not found. Text is not available for all patent documents. The current dates of coverage are on the Currency of Information page
Sorry, the representative drawing for patent document number 540821 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 from PCS | 2021-12-04 |
| Inactive: First IPC from PCS | 2021-12-04 |
| Inactive: Expired (old Act Patent) latest possible expiry date | 1974-05-14 |
| Grant by Issuance | 1957-05-14 |
There is no abandonment history.
Note: Records showing the ownership history in alphabetical order.
| Current Owners on Record |
|---|
| ALUMINUM COMPANY OF AMERICA |
| Past Owners on Record |
|---|
| MARGARET W. BRENNECKE |
| JR. JOSEPH A. NOCK |
