Jianfeng Chen

US Patent:

8642355, Feb 4, 2014

Filed:

Jun 25, 2013

Appl. No.:

13/926825

Inventors:

Jianfeng Chen - San Ramon CA, US

International Classification:

G01N 33/543
G01N 33/48

US Classification:

436518, 436524, 436538, 436810, 435 71, 435 72

Abstract:

A versatile drug testing device (a lateral flow diagnostic testing device) includes a flat transparent carrier with a top and a bottom with the carrier having a series of independent parallel grooves formed therein running from adjacent to the top to adjacent to the bottom of the carrier, each groove having a first opening and a second opening above the first opening therein adjacent to the bottom of the carrier, at least one drug test strip installed in one of said grooves with its absorbent pad contiguous to the openings and a cover layer attached to the carrier operable to sealing close each of said grooves whereby the bottom of the device can be immersed in a specimen of urine, body fluid, or other biological specimen to wet the pad of the at least one test strip though the ingress of the specimen though the associated openings and the test results on the test strip can be easily viewed through the transparent carrier. Because of the unique construction the device will give accurate reading if temporarily immersed in the specimen or left in the specimen for an extended period of time, making it very user friendly.

US Patent:

20130068649, Mar 21, 2013

Filed:

Aug 20, 2012

Appl. No.:

13/590180

Inventors:

Jianfeng Chen - San Ramon CA, US

International Classification:

B65D 55/02

US Classification:

2064591

Abstract:

A disclosed technique includes an assembly comprising a cup with a first visual sealing indicator and a lid with a second visual sealing indicator wherein, in operation, the lid is screwed on the cup to a sealing indicator position where the first visual sealing indicator and the second visual sealing indicator are aligned. Another disclosed technique includes an assembly comprising a cup with a first audible sealing indicator and a lid with a second audible sealing indicator wherein, in operation, the lid is screwed on the cup to a position past where the first audible sealing indicator and the second audible sealing indicator have contacted each other producing an audible sound. Another disclosed technique includes a cup with a raised central bottom area and an insert with bracing wings wherein, in operation, the bracing wings stabilize and secure the insert in the cup.

US Patent:

20200198862, Jun 25, 2020

Filed:

Dec 19, 2019

Appl. No.:

16/720790

Inventors:

- Hayward CA, US
Jianfeng Chen - San Ramon CA, US

International Classification:

B65D 55/02
B01L 3/00
G01N 33/493

Abstract:

A disclosed technique includes an assembly comprising a cup with a first visual sealing indicator and a lid with a second visual sealing indicator wherein, in operation, the lid is screwed on the cup to a sealing indicator position where the first visual sealing indicator and the second visual sealing indicator are aligned. Another disclosed technique includes an assembly comprising a cup with a first audible sealing indicator and a lid with a second audible sealing indicator wherein, in operation, the lid is screwed on the cup to a position past where the first audible sealing indicator and the second audible sealing indicator have contacted each other producing an audible sound. Another disclosed technique includes a cup with a raised central bottom area and an insert with bracing wings wherein, in operation, the bracing wings stabilize and secure the insert in the cup.

US Patent:

20140147931, May 29, 2014

Filed:

Feb 3, 2014

Appl. No.:

14/171551

Inventors:

Jianfeng Chen - San Ramon CA, US

International Classification:

B01L 3/00
G01N 33/94

US Classification:

436174, 422552

Abstract:

A versatile drug testing device (a lateral flow diagnostic testing device) includes a flat transparent carrier with a top and a bottom with the carrier having a series of independent parallel grooves formed therein running from adjacent to the top to adjacent to the bottom of the carrier, each groove having a first opening and a second opening above the first opening therein adjacent to the bottom of the carrier, at least one drug test strip installed in one of said grooves with its absorbent pad contiguous to the openings and a cover layer attached to the carrier operable to sealing close each of said grooves whereby the bottom of the device can be immersed in a specimen of urine, body fluid, or other biological specimen to wet the pad of the at least one test strip though the ingress of the specimen though the associated openings and the test results on the test strip can be easily viewed through the transparent carrier. Because of the unique construction the device will give accurate reading if temporarily immersed in the specimen or left in the specimen for an extended period of time, making it very user friendly.