Patents by Inventor Jielin Dai

Jielin Dai has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20050202568
    Abstract: The present invention is directed to devices and methods for determining the presence of analyte in a fluid sample. The devices utilize a sample collection well, an expression plate for expressing sample into the sample collection well, a plunger that drives a seal, and a test compartment containing test elements. The devices also contain a reservoir for preserving an aliquot of sample for later confirmation testing. When the plunger is lowered into the sample collection well, an aliquot of sample is sealed in the reservoir. In one embodiment the plunger is lowered as a cap is applied to the device. The devices are useful for detecting the presence of analyte in a wide variety of fluid samples, such as saliva. The invention also provides methods of using the devices, and kits containing the devices.
    Type: Application
    Filed: November 15, 2004
    Publication date: September 15, 2005
    Inventors: Hsiaoho Tung, Yuzhang Wu, Jielin Dai, Ying Yang
  • Publication number: 20050180882
    Abstract: The present invention provides test devices for detecting an analyte suspected of being present in a liquid sample. The devices contain a reservoir compartment, a test compartment, and a port for a sample collection well. The devices also have a rotatable sample collection well located in the port. The device has an upper chamber for insertion of a sample applicator, an expression plate for wringing out the sample applicator and applying sample to the device, a lower chamber, and an aliquot outlet and a reservoir outlet for the movement of sample through the device. The device also contains test elements for detecting the analyte of interest. By rotating the sample collection well, the operator is able to direct distribution of collected sample in the device. Methods of using the devices and kits containing the devices are also provided.
    Type: Application
    Filed: November 15, 2004
    Publication date: August 18, 2005
    Inventors: Hsiaoho Tung, Yuzhang Wu, Jielin Dai, Ying Yang
  • Publication number: 20050119589
    Abstract: The present invention is directed to devices and methods for determining the presence of analyte in a fluid sample. The devices utilize a sample collection well, an expression plate for expressing sample into the sample collection well, a plunger that drives a lance, and a test compartment containing test elements. The devices also preserve an aliquot of fluid sample in a reservoir for later confirmation testing. When the plunger is lowered into the sample collection well, a lance on the device punctures a frangible material that covers a sample outlet. When the sample outlet is thus opened, fluid sample flows from the sample collection cup to the test compartment. In one embodiment the plunger is lowered as a cap is applied to the device. The devices are useful for detecting the presence of analyte in a wide variety of fluid samples, such as saliva, oral fluids, and more. The invention also provides methods of using the devices, and kits containing the devices.
    Type: Application
    Filed: November 15, 2004
    Publication date: June 2, 2005
    Inventors: Hsiaoho Tung, Yuzhang Wu, Jielin Dai, Ying Yang
  • Publication number: 20050112024
    Abstract: Medical and environmental diagnostic devices are described and claimed. Preferred embodiments feature cup within cup configurations wherein one cup is dedicated, for the most part, to sample collection and another cup is dedicated, for the most part, to assay performance. Communication between the cups is afforded by what is believed to be a unique valve assembly and lid tandem.
    Type: Application
    Filed: November 15, 2004
    Publication date: May 26, 2005
    Inventors: Lijian Guo, Yuzhang Wu, Jielin Dai, Hsiaoho Tung
  • Publication number: 20050106750
    Abstract: The present invention is directed to devices and methods for collecting liquid samples and of testing the sample for the presence of an analyte of interest and/or a physical property. In one embodiment the device is a urine cup having an interior for containing a liquid sample, a lid, and a chamber for holding liquid. The device contains a test component for determining the presence of an analyte in the liquid sample and/or a physical property. A tube is immersed in liquid sample when the device is filled with liquid sample to be tested. When the lid is applied to the device (e.g., by screwing or snapping on), liquid sample is forced through the tube and into the chamber holding the test component.
    Type: Application
    Filed: November 15, 2004
    Publication date: May 19, 2005
    Inventors: Hsiaoho Tung, Yuzhang Wu, Jielin Dai, Ying Yang
  • Publication number: 20040237674
    Abstract: The present invention is a device for conveniently collecting and storing liquid samples, as well as applying an aliquot of the sample to a test device, such as a lateral flow immunoassay. The present invention comprises an absorbent swab and a dropper container containing an expression means for expressing the collected sample from the swab. After the collected sample has been expressed into the reservoir of the device, the device is capped. The device can be inverted over a test device, the sides of the reservoir squeezed and an aliquot of the sample applied, in a drop-wise manner, to the sample application well of the test device. The present invention is particularly useful for collecting viscous samples, such as saliva or oral fluid, in a drug of abuse testing setting.
    Type: Application
    Filed: May 27, 2004
    Publication date: December 2, 2004
    Inventors: Yuchang Wu, Hsiaoho Edward Tung, Huiyan Guo, Fei Gao, Jielin Dai, Haipeng Hu