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(12) Patent: | (11) CA 2812202 |
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(54) English Title: | METHOD AND SYSTEM FOR REMOVING MATURE FINE TAILINGS OF A DESIRED DENSITY FROM A TAILINGS POND |
(54) French Title: | PROCEDE ET APPAREIL DESTINE A EXTRAIRE DES RESIDUS FINS MATURES D'UNE DENSITE DESIREE D'UN BASSIN DE RESIDUS |
Status: | Granted and Issued |
(51) International Patent Classification (IPC): |
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(72) Inventors : |
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(73) Owners : |
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(71) Applicants : |
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(74) Agent: | GOWLING WLG (CANADA) LLP |
(74) Associate agent: | |
(45) Issued: | 2016-02-16 |
(22) Filed Date: | 2013-04-02 |
(41) Open to Public Inspection: | 2014-02-11 |
Examination requested: | 2013-10-16 | Green Technology Granted: | 2014-10-28 |
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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A method and a system for removal of Mature Fine Tailings (MFT) out of oilsands tailings ponds, specifically enabling year-round removal of MFT which density is greater than 1.35 t/m3. It utilizes a hollow, essentially fully enclosed around its perimeter, ideally of cylindrical form structure, (henceforth called the "structure") (5) of predetermined geometry, which is placed at the pond surface as shown in Figure 2. Water and less dense MFT initially located within the structure is moved outside the structure, while the MFT of required density which is surrounding the structure enters it under the action of hydrostatic pressure as per Figure 6. Continuous MFT removal operation is enabled due to simultaneous inflow of MFT surrounding the structure so that the hydrostatic equilibrium as per Formula 1 noted herein is maintained.
Un procédé et un système pour extraire des résidus fins matures de bassins de résidus de sables bitumineux, permettant plus précisément une extraction à longueur dannée de résidus fins matures dont la densité est supérieure à 1,35 t/m3. Il utilise une cavité, sensiblement complètement fermée autour de son périmètre, idéalement une structure de forme cylindrique (maintenant appelée la « structure ») (5) dune géométrie prédéterminée, laquelle est placée à la surface du bassin comme le montre la Figure 2. Leau et les résidus fins matures moins denses initialement situés à lintérieur de la structure sont déplacés à lextérieur de la structure, alors que les résidus fins matures de la densité requise qui entourent la structure y entrent sous laction de la pression hydrostatique comme le montre la Figure 6. Une opération dextraction continue de résidus fins matures est permise en raison du débit entrant simultané des résidus fins matures qui entourent la structure de sorte que léquilibre hydrostatique selon la Formule 1 notée ici est maintenu.
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.
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Description | Date |
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Maintenance Fee Payment Determined Compliant | 2022-05-20 |
Inactive: Late MF processed | 2022-05-20 |
Letter Sent | 2022-04-04 |
Common Representative Appointed | 2019-10-30 |
Common Representative Appointed | 2019-10-30 |
Change of Address or Method of Correspondence Request Received | 2018-06-11 |
Grant by Issuance | 2016-02-16 |
Inactive: Cover page published | 2016-02-15 |
Inactive: Protest acknowledged | 2016-01-26 |
Inactive: Protest/prior art received | 2016-01-13 |
Inactive: Protest acknowledged | 2016-01-11 |
Inactive: Protest/prior art received | 2016-01-04 |
Inactive: Protest acknowledged | 2015-12-23 |
Inactive: Protest/prior art received | 2015-12-14 |
Inactive: Final fee received | 2015-12-04 |
Pre-grant | 2015-12-04 |
Notice of Allowance is Issued | 2015-11-19 |
Letter Sent | 2015-11-19 |
Notice of Allowance is Issued | 2015-11-19 |
Inactive: Approved for allowance (AFA) | 2015-11-17 |
Inactive: Q2 passed | 2015-11-17 |
Amendment Received - Voluntary Amendment | 2015-10-08 |
Inactive: S.30(2) Rules - Examiner requisition | 2015-07-15 |
Inactive: Report - No QC | 2015-07-14 |
Letter Sent | 2015-06-25 |
Inactive: Protest/prior art received | 2015-06-17 |
Amendment Received - Voluntary Amendment | 2015-05-28 |
Inactive: S.30(2) Rules - Examiner requisition | 2015-05-04 |
Inactive: Report - No QC | 2015-05-04 |
Revocation of Agent Requirements Determined Compliant | 2015-03-17 |
Appointment of Agent Requirements Determined Compliant | 2015-03-17 |
Inactive: Office letter | 2015-03-13 |
Inactive: Office letter | 2015-03-13 |
Inactive: Reply to s.37 Rules - Non-PCT | 2015-03-03 |
Amendment Received - Voluntary Amendment | 2015-03-03 |
Revocation of Agent Request | 2015-02-23 |
Appointment of Agent Request | 2015-02-23 |
Inactive: Report - No QC | 2014-12-04 |
Inactive: S.30(2) Rules - Examiner requisition | 2014-12-04 |
Revocation of Agent Requirements Determined Compliant | 2014-11-18 |
Inactive: Office letter | 2014-11-18 |
Inactive: Office letter | 2014-11-18 |
Appointment of Agent Requirements Determined Compliant | 2014-11-18 |
Revocation of Agent Request | 2014-11-05 |
Appointment of Agent Request | 2014-11-05 |
Letter sent | 2014-10-28 |
Advanced Examination Determined Compliant - Green | 2014-10-28 |
Inactive: Office letter | 2014-09-25 |
Inactive: Correspondence - Formalities | 2014-09-17 |
Letter Sent | 2014-08-27 |
Inactive: Single transfer | 2014-08-20 |
Inactive: Cover page published | 2014-02-17 |
Application Published (Open to Public Inspection) | 2014-02-11 |
Inactive: Office letter | 2013-12-17 |
Early Laid Open Requested | 2013-12-12 |
Inactive: Office letter | 2013-11-21 |
Letter Sent | 2013-10-23 |
Request for Examination Received | 2013-10-16 |
Request for Examination Requirements Determined Compliant | 2013-10-16 |
All Requirements for Examination Determined Compliant | 2013-10-16 |
Inactive: Advanced examination (SO) | 2013-10-16 |
Inactive: First IPC assigned | 2013-05-31 |
Inactive: IPC assigned | 2013-05-31 |
Application Received - Regular National | 2013-04-23 |
Inactive: Office letter | 2013-04-23 |
Inactive: Filing certificate - No RFE (English) | 2013-04-23 |
Small Entity Declaration Determined Compliant | 2013-04-02 |
There is no abandonment history.
The last payment was received on 2015-03-18
Note : If the full payment has not been received on or before the date indicated, a further fee may be required which may be one of the following
Patent fees are adjusted on the 1st of January every year. The amounts above are the current amounts if received by December 31 of the current year.
Please refer to the CIPO
Patent Fees
web page to see all current fee amounts.
Fee Type | Anniversary Year | Due Date | Paid Date |
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Application fee - small | 2013-04-02 | ||
Request for examination - small | 2013-10-16 | ||
Registration of a document | 2014-08-20 | ||
MF (application, 2nd anniv.) - small | 02 | 2015-04-02 | 2015-03-18 |
Final fee - small | 2015-12-04 | ||
MF (patent, 3rd anniv.) - small | 2016-04-04 | 2016-03-07 | |
MF (patent, 4th anniv.) - small | 2017-04-03 | 2017-01-10 | |
MF (patent, 5th anniv.) - small | 2018-04-03 | 2018-01-09 | |
MF (patent, 6th anniv.) - small | 2019-04-02 | 2019-01-14 | |
MF (patent, 7th anniv.) - small | 2020-04-02 | 2020-01-20 | |
MF (patent, 8th anniv.) - small | 2021-04-06 | 2021-02-10 | |
MF (patent, 10th anniv.) - small | 2023-04-03 | 2022-05-20 | |
MF (patent, 11th anniv.) - small | 2024-04-02 | 2022-05-20 | |
Late fee (ss. 46(2) of the Act) | 2022-05-20 | 2022-05-20 | |
MF (patent, 9th anniv.) - small | 2022-04-04 | 2022-05-20 |
Note: Records showing the ownership history in alphabetical order.
Current Owners on Record |
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TECHNIKA ENGINEERING LTD. |
Past Owners on Record |
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RADE SVORCAN |