ph electrodes

• US 3,224,433 A
• Filed: 04/10/1961
• Issued: 12/21/1965
• Est. Priority Date: 04/10/1961
• Status: Expired due to Term

• Current Assignee: Von Dalebor Henry J Hroch
• Original Assignee: Von Dalebor Henry J Hroch
• Inventors: VON DALEBOR HENRY J HROCH
• Application Number:
  US04/101,946
• Time in Patent Office: 1,716 Days
• US Class Current: 600/361
• CPC Class Codes: A61B 5/14539 for measuring pH
• CPC Class Codes: A61B 5/14542 for measuring blood gases A61B5/14551 takes precedence
• CPC Class Codes: A61B 5/1473 invasive, e.g. introduced into the body by a catheter A61B5/1482 takes precedence
• CPC Class Codes: A61B 5/6848 Needles

Claims

1. A PH ELECTRODE ASSEMBLY COMPRISING A HYPODERMIC NEEDLE HAVING AN AXIAL BORE AND A POINTED END, A GLASS PH ELECTRODE HAVING A TUBE PORTION LOCATED WITHIN SAID BORE AND TERMINATING THEREIN ADJACENT SAID NEEDLE END, AND AN ELONGATED WINDOW IN THE WALL OF SAID NEEDLE EXTENDING FROM ADJACENT SAID END PARALLEL TO THE AXIS OF SAID NEEDLE, AND PASSING FROM THE EXTERIOR OF SAID NEEDLE TO SAID BORE, A SECTION OF SAID TUBE PORTION WHICH IS IN REGISTER WITH SAID WINDOW BEING ARRANGED TO CONSTITUTE A PH-SENSITIVE MEMBRANE.