# US 2026/0076709 A1 · Balloon for balloon catheter and balloon catheter including same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2026/0076709 A1 - Document ID: US20260076709A1 - Status: Published application - Kind: A1 - Application number: 19/398,274 - Filed: 2025-11-24 - Published: 2026-03-19 - Earliest claimed: 2023-05-30 - Assignees: Kaneka Corporation - Applicants: Kaneka Corporation - Inventors: Masahiro Kojima; Takahisa Hamabuchi; Masato Tsueda - Web page: https://patentgrep.com/patent/US20260076709A1 ## CPC - A61B 17/320725: {with radially expandable cutting or abrading elements (A61B17/32075 takes precedence)} - A61M 25/10: Balloon catheters ({A61M25/0125 takes precedence; embolectomy A61B17/22032; retractors A61B17/02;} inflatable balloons for placing stents or stent-grafts A61F2/958 {; stomach balloons for treatment of obesity A61F5/0003; oesophagal tubes A61J15/00}) - A61M 25/1002: {characterised by balloon shape (A61M25/1006, A61M25/1009 take precedence)} - A61B 2017/22061: {for spreading elements apart} - A61M 25/104: {used for angioplasty} - A61M 2025/1004: {Balloons with folds, e.g. folded or multifolded} - A61M 2025/1086: {having a special balloon surface topography, e.g. pores, protuberances, spikes or grooves} - A61M 2025/109: {having balloons for removing solid matters, e.g. by grasping or scraping plaque, thrombus or other matters that obstruct the flow} - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) - A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)} ## Abstract A balloon for a balloon catheter that, when deflated, can cut a stenosed site and be easily folded to reduce outer diameter and a balloon catheter including the balloon are provided. The balloon includes a balloon main body having an outer surface and an inner surface and a protruding portion protruding outward in a radial direction from the outer surface of the main body and extending in a longitudinal axis direction. The protruding portion in a straight tube portion has an ST-portion notch and the protruding portion in a distal-side tapered portion has a DT-portion notch. A depth of the ST-portion notch and a depth (D4) of the DT-portion notch are each 50 μm or more, and the depth (D3), a height (H3) of the protruding portion in the straight tube portion, the depth (D4), and a height (H4) of the protruding portion in the distal-side tapered portion satisfy D3/H3≤D4/H4. ## Claims ### Claim 1 A balloon for a balloon catheter comprising: a straight tube portion; a proximal-side tapered portion positioned on a proximal side of the straight tube portion; a proximal-side sleeve portion positioned on a proximal side of the proximal-side tapered portion; a distal-side tapered portion positioned on a distal side of the straight tube portion; a distal-side sleeve portion positioned on a distal side of the distal-side tapered portion; a balloon main body having an outer surface and an inner surface; and a protruding portion protruding radially outward from the outer surface of the balloon main body and extending in a longitudinal axis direction, wherein the protruding portion in the straight tube portion has at least one notch (ST-portion notch), and the protruding portion in the distal-side tapered portion has at least one notch (DT-portion notch), wherein a depth D3 of the at least one ST-portion notch and a depth D4 of the at least one DT-portion notch are each 50 μm or more, and wherein the depth D3 of the at least one ST-portion notch, a height H3 of the protruding portion in the straight tube portion, the depth D4 of the at least one DT-portion notch, and a height H4 of the protruding portion in the distal-side tapered portion satisfy a relationship of D3/H3≤D4/H4. ### Claim 2 (depends on 1) The balloon for the balloon catheter according to claim 1, wherein the at least one ST-portion notch includes a plurality of ST-portion notches, and the depth D3 is an average of depths of the plurality of ST-portion notches. ### Claim 3 (depends on 1) The balloon for the balloon catheter according to claim 1, wherein the at least one DT-portion notch includes a plurality of DT-portion notches, and the depth D4 is an average of depths of the plurality of DT-portion notches. ### Claim 4 (depends on 1) The balloon for the balloon catheter according to claim 1, wherein the height H3 of the protruding portion in the straight tube portion and the height H4 of the protruding portion in the distal-side tapered portion satisfy a relationship of H3≥H4. ### Claim 5 (depends on 1) The balloon for the balloon catheter according to claim 1, wherein: the protruding portion in the proximal-side tapered portion has at least one notch (PT-portion notch), a depth D2 of the at least one PT-portion notch is 50 μm or more, and the depth D3 of the at least one ST-portion notch, the height H3 of the protruding portion in the straight tube portion, the depth D2 of the at least one PT-portion notch, and a height H2 of the protruding portion in the proximal-side tapered portion satisfy a relationship of D3/H3≤D2/H2. ### Claim 6 (depends on 5) The balloon for the balloon catheter according to claim 5, wherein the at least one PT-portion notch includes a plurality of PT-portion notches, and the depth D2 is an average of depths of the plurality of PT-portion notches. ### Claim 7 (depends on 5) The balloon for the balloon catheter according to claim 5, wherein the height H3 of the protruding portion in the straight tube portion and the height H2 of the protruding portion in the proximal-side tapered portion satisfy a relationship of H3≥H2. ### Claim 8 (depends on 5) The balloon for the balloon catheter according to claim 5, wherein the height H3 of the protruding portion in the straight tube portion and the height H2 of the protruding portion in the proximal-side tapered portion satisfy a relationship of H3D2/H2. ### Claim 10 (depends on 9) The balloon for the balloon catheter according to claim 9, wherein the height H3 of the protruding portion in the straight tube portion and the height H2 of the protruding portion in the proximal-side tapered portion satisfy a relationship of H3≥H2. ### Claim 11 (depends on 9) The balloon for the balloon catheter according to claim 9, wherein the height H3 of the protruding portion in the straight tube portion and the height H2 of the protruding portion in the proximal-side tapered portion satisfy a relationship of H3