Invention Grant
- Patent Title: Dispensing needle for a fraction collector
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Application No.: US14632073Application Date: 2015-02-26
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Publication No.: US09791423B2Publication Date: 2017-10-17
- Inventor: Theodore Dourdeville , Joshua A. Burnett , James Usowicz , Marc Lemelin , Lucas O. Tiziani
- Applicant: Waters Technologies Corporation
- Applicant Address: US MA Milford
- Assignee: WATERS TECHNOLOGIES CORPORATION
- Current Assignee: WATERS TECHNOLOGIES CORPORATION
- Current Assignee Address: US MA Milford
- Agency: Schmeiser, Olsen & Watts LLP
- Main IPC: G01N30/80
- IPC: G01N30/80 ; B01L3/02 ; G01N30/02

Abstract:
Described is a dispensing needle for a fraction collector. The dispensing needle includes a conduit having a fluid channel to conduct a chromatographic flow, an interior wall that defines the fluid channel, an exterior surface and an endface through which the chromatographic flow is dispensed. The dispensing needle also includes a coating of a hydrocarbon material or a fluorocarbon material that is bonded to the endface. The coating is also bonded to at least a portion of the exterior surface that is adjacent to the endface and at least a portion of the interior wall that is adjacent to the endface. The coating operates to reduce a droplet volume of a liquid dispensed from the endface that may remain at the tip of the dispensing needle. Consequently, the concentration variation in a collected fraction due to a missing droplet or extra droplet is reduced.
Public/Granted literature
- US20150247830A1 DISPENSING NEEDLE FOR A FRACTION COLLECTOR Public/Granted day:2015-09-03
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