Invention Grant
- Patent Title: Hybrid gradient delivery system and operation
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Application No.: US16299805Application Date: 2019-03-12
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Publication No.: US11130074B2Publication Date: 2021-09-28
- Inventor: Joseph A. Luongo , Craig Hamilton Dobbs
- 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: B01D15/14
- IPC: B01D15/14 ; B01D15/16 ; G01N30/34 ; G01N30/38 ; G01N30/20

Abstract:
A solvent delivery system for a liquid chromatography system may include a first gradient proportioning valve in fluidic communication with a first plurality of sources of solvent and producing therefrom a first low-pressure gradient stream. The solvent delivery system may further include a second gradient proportioning valve in direct fluidic communication with an inlet of the first gradient proportioning valve and with a second plurality of sources of solvent, the second gradient proportioning valve producing a second low-pressure gradient stream from the second plurality of sources of solvent, wherein one solvent source of the first plurality of sources of solvent used by the first gradient proportioning valve to produce the first low-pressure gradient stream comprises the second low-pressure gradient stream. The solvent delivery system may also include a first pump in direct fluidic communication with the first gradient proportioning valve to receive and pressurize the first low-pressure gradient stream.
Public/Granted literature
- US20190201811A1 HYBRID GRADIENT DELIVERY SYSTEM AND OPERATION Public/Granted day:2019-07-04
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