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(12) Patent Application: | (11) CA 2210902 |
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(54) English Title: | USE AS COLD TRANSFER MEDIA OF AQUEOUS SOLUTIONS OF LOWER ALCOHOLS |
(54) French Title: | UTILISATION DE SOLUTIONS AQUEUSES D'ALCOOLS INFERIEURS COMME MILIEU DE TRANSFERT DU FROID |
Status: | Deemed Abandoned and Beyond the Period of Reinstatement - Pending Response to Notice of Disregarded Communication |
(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: | SMART & BIGGAR LP |
(74) Associate agent: | |
(45) Issued: | |
(22) Filed Date: | 1997-07-21 |
(41) Open to Public Inspection: | 1998-01-23 |
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: | ||||||
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Disclosed is a cold transfer medium for use in a
refrigeration system having separate circuits for a refrigerant
and the cold transfer medium. The cold transfer medium is an
aqueous solution of a lower alcohol with the addition of (1) a
low molecular weight polycarboxylic acid, (2) an ester or salt
of sorbic acid, (3) a polyhydric alcohol, (4) an aliphatic acid
or a salt of an aliphatic acid, (5) an anionic surfactant
and/or (6) a sulfur-free triazole compound. Also disclosed is
such an aqueous solution containing finely divided silica as a
sedimentation inhibitor.
On divulgue un milieu de transfert du froid pour utilisation dans un système de réfrigération ayant des circuits séparés pour le réfrigérant et le milieu de transfert du froid. Le milieu de transfert du froid est une solution aqueuse d'un alcool inférieur additionnée (1) d'un acide polycarboxylique de faible poids moléculaire, (2) d'un ester ou d'un sel de l'acide sorbique, (3) d'un polyalcool, (4) d'un acide aliphatique ou d'un sel d'un acide aliphatique, (5) d'un surfactant anionique et/ou (6) d'un composé de triazole sans soufre. On divulgue également une solution aqueuse contenant de la silice finement divisée comme inhibiteur de sédimentation.
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 2210902 was not found.
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Description | Date |
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Inactive: IPC from MCD | 2006-03-12 |
Application Not Reinstated by Deadline | 2002-07-22 |
Time Limit for Reversal Expired | 2002-07-22 |
Deemed Abandoned - Failure to Respond to Maintenance Fee Notice | 2001-07-23 |
Letter Sent | 2001-04-02 |
Letter Sent | 1998-03-06 |
Application Published (Open to Public Inspection) | 1998-01-23 |
Classification Modified | 1997-10-30 |
Inactive: First IPC assigned | 1997-10-30 |
Inactive: IPC assigned | 1997-10-30 |
Inactive: Single transfer | 1997-10-10 |
Application Received - Regular National | 1997-09-29 |
Inactive: Courtesy letter - Evidence | 1997-09-29 |
Inactive: Filing certificate - No RFE (English) | 1997-09-29 |
Abandonment Date | Reason | Reinstatement Date |
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2001-07-23 |
The last payment was received on 2000-06-27
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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web page to see all current fee amounts.
Fee Type | Anniversary Year | Due Date | Paid Date |
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Application fee - standard | 1997-07-21 | ||
Registration of a document | 1997-07-21 | ||
MF (application, 2nd anniv.) - standard | 02 | 1999-07-21 | 1999-06-25 |
MF (application, 3rd anniv.) - standard | 03 | 2000-07-21 | 2000-06-27 |
Registration of a document | 2001-01-31 |
Note: Records showing the ownership history in alphabetical order.
Current Owners on Record |
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HULS AKTIENGESELLSCHAFT |
DEGUSSA-HULS AKTIENGESELLSCHAFT |
Past Owners on Record |
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DIERK LANDWEHR |