Shanfeng
Shanfeng Jiang, Elst NL
Patent application number | Description | Published |
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20120244231 | NON-CAKING POTASSIUM CHLORIDE COMPOSTION, PREPARATION PROCESS AND USE THEREOF - The present invention relates to a potassium chloride composition comprising an iron complex of tartaric acid, characterized in that at least 5% by weight of the tartaric acid is mesotartaric acid and that a 10% by weight aqueous solution of said potassium chloride composition has a pH value of between 6 and 11. The present invention furthermore relates to a process to prepare such a potassium chloride composition and to the use of such a potassium chloride composition. | 09-27-2012 |
20140072718 | NON-CAKING POTASSIUM CHLORIDE COMPOSITION, PREPARATION PROCESS AND USE THEREOF - The present invention relates to a potassium chloride composition comprising an iron complex of tartaric acid, characterized in that at least 5% by weight of the tartaric acid is mesotartaric acid and that a 10% by weight aqueous solution of said potassium chloride composition has a pH value of between 6 and 11. The present invention furthermore relates to a process to prepare such a potassium chloride composition and to the use of such a potassium chloride composition. | 03-13-2014 |
Shanfeng Li, Shenzhen CN
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20080310858 | APPARATUS AND METHOD OF OPTICAL COMPENSATION FOR SUBMARINE OPTICAL CABLE - The present invention provides optical compensation for a submarine optical cable optical. A dummy light module generates a dummy light signal according to a continuous spectrum in a predetermined range and a combining module combines a service signal with the dummy light signal. When the dummy light is used for the compensation, conventional problems are solved, including complicated control, difficult realization of the pre-equalization function and inflexible configuration. When service signals are increased, the adjustment for the power of the dummy light signal is avoided; therefore, the control for the dummy light is simplified. In the pre-equalization operation, power control is only performed on the dummy light signal in the single channel or the continuous dummy light signal; therefore, the realization of the pre-equalization function is easy. | 12-18-2008 |
Shanfeng Zhang, Shenzhen CN
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20120057507 | Charging method and system for prepaid service - The present invention discloses a charging method and system for a prepaid service. The charging method comprises the following steps that: a VPN charging management module presets different VPN package charging levels in the prepaid service, receives a calling request from a user terminal, and determines whether there is at least one VPN valid user in a calling terminal and a called terminal and determines whether this calling belongs to the preset different VPN package charging levels; and a VPN charging module charges the calling terminal or the called terminal which is a VPN valid user for this calling according to the VPN package charging level to which the calling terminal or the called terminal belongs, and ends this calling if the amount of the user terminal account is insufficient. The present invention realizes the flexible VPN charging in the prepaid service, not only enables a user to enjoy more flexible charging and save charges conveniently, but also it is favourable for the service promotion of operators, without changing the existing service framework structure and development interface, and saves the development costs of operators by synchronizing to multiple systems by a synchronization module. | 03-08-2012 |