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 Application: | (11) CA 2001163 |
---|---|
(54) English Title: | BORON-CONTAINING STEELS AND PROCESS FOR THEIR ANNEALING |
(54) French Title: | ACIERS AU BORE ET PROCEDE DE RECUIT CONNEXE |
Status: | Deemed Abandoned and Beyond the Period of Reinstatement - Pending Response to Notice of Disregarded Communication |
(51) International Patent Classification (IPC): |
|
---|---|
(72) Inventors : |
|
(73) Owners : |
|
(71) Applicants : |
|
(74) Agent: | SMART & BIGGAR LP |
(74) Associate agent: | |
(45) Issued: | |
(22) Filed Date: | 1989-10-20 |
(41) Open to Public Inspection: | 1990-04-22 |
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: | ||||||
---|---|---|---|---|---|---|
|
ABSTRACT
The invention relates to boron-containing steels and a process
for the annealing of steel products having boron contents of up
to 200 ppm in the temperature range of between 850 and 1050°C.
The characterizing feature of the invention is that the products
are annealed in the state of equilibrium in a non-oxidizing
gaseous atmosphere with a boron potential supplied by a
pulverulent boron oxide source having a value such that the
products retain or adsorb their boron content. The boron source
is quantitatively about 100 g of B2O3 per m3 of annealing space.
In an annealing gas atmosphere mainly consisting of hydrogen the
steam partial pressure can be adjusted at atmospheric pressure
the presence of B2O3 to the required boron activity within the
range of between 10-3 to 10-5.
The products can also be simultaneously case hardened during
annealing. The case hardening agent can be mixed with
pulverulent boron oxide as the boron source.
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 2001163 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 MCD | 2006-03-11 |
Inactive: IPC from MCD | 2006-03-11 |
Inactive: IPC from MCD | 2006-03-11 |
Inactive: IPC from MCD | 2006-03-11 |
Inactive: Abandon-RFE+Late fee unpaid-Correspondence sent | 1996-10-21 |
Inactive: Adhoc Request Documented | 1996-10-21 |
Application Not Reinstated by Deadline | 1994-04-20 |
Time Limit for Reversal Expired | 1994-04-20 |
Deemed Abandoned - Failure to Respond to Maintenance Fee Notice | 1993-10-20 |
Inactive: Adhoc Request Documented | 1993-10-20 |
Application Published (Open to Public Inspection) | 1990-04-22 |
Abandonment Date | Reason | Reinstatement Date |
---|---|---|
1993-10-20 |
Note: Records showing the ownership history in alphabetical order.
Current Owners on Record |
---|
THYSSEN EDELSTAHLWERKE AG |
Past Owners on Record |
---|
BERND HUCHTEMANN |
DIETRICH WERNER |
HELMUT BRANDIS |
PETER SCHULER |