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(12) Patent: | (11) CA 2359149 |
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(54) English Title: | METHOD OF CLEANING CONTAMINANTS FROM A MULTI-LAYERED MESH FILTER |
(54) French Title: | METHODE DE NETTOYAGE DE FILTRE A TAMIS MULTICOUCHES |
Status: | Expired and beyond the Period of Reversal |
(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: | NATHAN V. WOODRUFFWOODRUFF, NATHAN V. |
(74) Associate agent: | |
(45) Issued: | 2006-10-31 |
(22) Filed Date: | 2001-10-16 |
(41) Open to Public Inspection: | 2003-04-16 |
Examination requested: | 2003-10-15 |
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 of cleaning contaminants from a multi-layered mesh filter. A first step involves immersing the filter in a chemical presoak tank containing a chemical cleaning agent effective with the contaminants. The chemical presoak tank is maintained at a temperature of not less than 160 degrees fahrenheit and not more than 180 degrees fahrenheit. The filter is maintained in the presoak tank for a time duration sufficient to soften the contaminants without causing the contaminants to break down into layers of constituent elements, while raising the temperature of the filter in preparation for cleaning. A second step involves immersing the filter in a cleaning tank containing hot water maintained at a temperature of not less than 160 degrees fahrenheit and not more than 180 degrees fahrenheit and subjecting the hot water in the cleaning tank to ultrasonic waves at a frequency of not less than 80 megahertz and not more than 120 megahertz.
Une méthode de nettoyage de contaminants d'un filtre à mailles à couches multiples. Une première étape consiste à immerger le filtre dans un bac de prétrempage chimique contenant un agent de nettoyage chimique efficace avec les contaminants. Le bac de prétrempage chimique est maintenu à une température d'au moins 160 degrés Fahrenheit et pas plus de 180 degrés Fahrenheit. Le filtre est maintenu dans le bac de prétrempage pendant une durée de temps suffisante pour ramollir les contaminants sans faire en sorte que les contaminants se décomposent en couches d'éléments constitutifs, tout en élevant la température du filtre en préparation pour le nettoyage. Une deuxième étape consiste à immerger le filtre dans une cuve de nettoyage contenant de l'eau chaude maintenue à une température d'au moins 160 degrés Fahrenheit et pas plus de 180 degrés Fahrenheit et soumettant l'eau chaude dans le réservoir de nettoyage à des ondes d'ultrasons à une fréquence d'au moins 80 mégahertz et pas plus de 120 mégahertz.
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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Time Limit for Reversal Expired | 2017-10-16 |
Letter Sent | 2016-10-17 |
Inactive: Late MF processed | 2012-10-24 |
Letter Sent | 2012-10-16 |
Inactive: Office letter | 2011-05-13 |
Inactive: Office letter | 2011-05-13 |
Revocation of Agent Requirements Determined Compliant | 2007-10-11 |
Inactive: Office letter | 2007-10-11 |
Inactive: Office letter | 2007-10-11 |
Appointment of Agent Requirements Determined Compliant | 2007-10-11 |
Revocation of Agent Request | 2007-10-03 |
Small Entity Declaration Determined Compliant | 2007-10-03 |
Appointment of Agent Request | 2007-10-03 |
Grant by Issuance | 2006-10-31 |
Inactive: Cover page published | 2006-10-30 |
Pre-grant | 2006-08-01 |
Inactive: Final fee received | 2006-08-01 |
Notice of Allowance is Issued | 2006-07-10 |
Letter Sent | 2006-07-10 |
Notice of Allowance is Issued | 2006-07-10 |
Inactive: Approved for allowance (AFA) | 2006-05-23 |
Amendment Received - Voluntary Amendment | 2006-04-21 |
Inactive: S.30(2) Rules - Examiner requisition | 2005-10-21 |
Inactive: S.29 Rules - Examiner requisition | 2005-10-21 |
Letter Sent | 2005-02-08 |
Inactive: Multiple transfers | 2004-08-16 |
Amendment Received - Voluntary Amendment | 2004-06-16 |
Letter Sent | 2003-10-30 |
All Requirements for Examination Determined Compliant | 2003-10-15 |
Request for Examination Requirements Determined Compliant | 2003-10-15 |
Request for Examination Received | 2003-10-15 |
Application Published (Open to Public Inspection) | 2003-04-16 |
Inactive: Cover page published | 2003-04-15 |
Letter Sent | 2002-10-16 |
Inactive: Single transfer | 2002-09-10 |
Inactive: First IPC assigned | 2002-02-18 |
Inactive: First IPC assigned | 2002-01-09 |
Inactive: IPC assigned | 2001-12-20 |
Inactive: IPC assigned | 2001-12-20 |
Inactive: IPC assigned | 2001-12-20 |
Inactive: Courtesy letter - Evidence | 2001-11-06 |
Inactive: Filing certificate - No RFE (English) | 2001-10-31 |
Application Received - Regular National | 2001-10-30 |
There is no abandonment history.
The last payment was received on 2006-08-01
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
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Note: Records showing the ownership history in alphabetical order.
Current Owners on Record |
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CAJ TECHNOLOGIES LTD. |
Past Owners on Record |
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JOHN F. KNOX |