The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 21, 2025
Filed:
Dec. 19, 2021
Applicant:
Douglas T. Gjerde, Saratoga, CA (US);
Inventor:
Douglas T. Gjerde, Saratoga, CA (US);
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N 1/34 (2006.01); G01N 1/40 (2006.01);
U.S. Cl.
CPC ...
G01N 1/34 (2013.01); G01N 1/4005 (2013.01); G01N 2001/4016 (2013.01);
Abstract
A water solvated chromatography bed is packed into the distal end of a syringe barrel. The syringe pumping piston is modified to be flat to match the top frit structure (that is also flat). The piston pump is pushed into the syringe barrel until the piston is directly above the column top frit. The pumping piston is moved forth quickly to dislodge entrained air in the bed. The piston pump moves directly above the resin bed with no air gap above the bed.