US20030139741A1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surgical instrument
Assignee: Gyrus Medical Ltd
•
Filing: 2002-12-31
•
Granted: —
•
Expires: 2022-12-31
Abstract
Abstract An electrosurgical instrument for use in cutting and/or coagulating tissue includes one or more electrode surfaces coated with a material having a positive temperature coefficient of impedance. The PTC coating acts to control the temperature of the electrodes and to reduce the incidence of tissue becoming adhered to the electrode surface. Examples of electrosurgical instruments employing such coated electrodes include forceps, scissors or scalpel blade instruments.
Inventors
- 👤 Colin Goble
- 👤 Mark Marshall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:03
CPC Classifications
A; A61; A61B; A61B18/00; A61B18/04; A61B18/12; A61B18/14; A61B18/1442; A61B18/1445
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
28 words
1 . A bipolar radio frequency electrosurgical instrument comprising at least first and second tissue-contacting electrodes, at least one of the electrodes being coated with a PTC material.
Claim 2
Dependent Claim
28 words
1 . A bipolar radio frequency electrosurgical instrument comprising at least first and second tissue-contacting electrodes, at least one of the electrodes being coated with a PTC material.
Claim 3
Dependent Claim
26 words
2 . A bipolar radio frequency electrosurgical instrument according to claim 1 wherein both of the first and second electrodes are coated with a PTC material.
Claim 4
Dependent Claim
20 words
3 . A bipolar radio frequency electrosurgical instrument according to claim 1 wherein the material is a dielectric PTC material.
Claim 5
Dependent Claim
20 words
4 . A bipolar radio frequency electrosurgical instrument according to claim 3 wherein the PTC material comprises a polymer material.
Claim 6
Dependent Claim
42 words
5 . A bipolar radio frequency electrosurgical instrument comprising at least first and second electrodes, each of the first and second electrodes having a tissue-contacting surface, the tissue-contacting surface of at least one of the electrodes being provided by a PTC material.
Claim 7
Dependent Claim
42 words
5 . A bipolar radio frequency electrosurgical instrument comprising at least first and second electrodes, each of the first and second electrodes having a tissue-contacting surface, the tissue-contacting surface of at least one of the electrodes being provided by a PTC material.
Claim 8
Dependent Claim
23 words
6 . A bipolar radio frequency electrosurgical instrument according to claim 5 wherein the instrument is in the form of pair of forceps.
Claim 9
Dependent Claim
23 words
7 . A bipolar radio frequency electrosurgical instrument according to claim 5 wherein the instrument is in the form of a scalpel blade.
Claim 10
Dependent Claim
20 words
8 . A bipolar radio frequency electrosurgical instrument according to claim 5 wherein the PTC material comprises a ceramic material.
Claim 11
Dependent Claim
19 words
9 . A bipolar radio frequency electrosurgical instrument according to claim 8 wherein the ceramic material comprises barium titanate.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.