Invalidity dossier
US 3841312
Electrode arrangement
Current assignee: CONSOLIDATED MEDICAL EQUIPMENT INC US
Added 9/23/2026, 5:49:16 PM
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Patent summary
Title, assignee, inventors, filing/issue dates, abstract, and a plain-language overview of the claims.
Patent Overview — US 3,841,312
Title: Electrode arrangement
Patent number: US 3,841,312 A (application US00346154A)
Assignee: Consolidated Medical Equipment Inc (original assignee; current assignee listed as CONSOLIDATED MEDICAL EQUIPMENT INC US)
Inventor: E. Corasanti
Dates: Priority/filing date 1973-03-29; publication/grant 1974-10-15; anticipated expiration 1991-10-15. Foreign priority filings listed for SE (7404251), FR (7411462) and DE (2415414), all 1974-03-29.
Legal status: Expired – Lifetime.
Purpose: The arrangement provides reliable electrical contact to the skin of a person or animal, permitting electroencephalogram (EEG) or electrocardiogram (ECG) readings via a connected EEG/ECG system.
Plain-language scope: The arrangement uses an elongated post (stud) and an apertured ring having multiple tabs that mechanically grip the post. The abstract also describes a combined electrode arrangement and adhesive pad assembly, in which a pair of electrically conductive irregularly shaped gel pads are located on opposite sides of the post flange, creating a short electrical contact path between the skin being monitored and the electrode post.
As described in the specification excerpt, a single, solid, unitary stud has a flat flange and a solid elongated extension member with a door-knob shaped portion for electrical contact to the EEG/ECG connector. The apertured metal ring's tabs are angularly displaced from the ring plane to give a spring-loaded connection; flat-edged contact portions "dig in and securely grip the stud." Gel pad, adhesive pad, and ring assembly steps are described in connection with FIGS. 6–9. The stated objective is an improved electrode arrangement, motivated by stated disadvantages of a prior two-piece post-and-stud arrangement (e.g., trapped dielectric material, difficulty silverplating a hollow stud).
Source: https://patents.google.com/patent/US3841312/en
What the excerpt does not establish: Full claim text, complete description, drawing contents, and any prosecution history. The excerpt is expressly partial ("consult the source for omitted text"), so claim scope cannot be verified. Litigation, ownership transfers, validity, and prior-art analysis are outside this overview.
Generated 10/1/2026, 9:43:16 PM
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Litigation summary
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PTAB challenges
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Assignment history
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Prior art
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Obviousness
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Extensions
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Derivative works
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