Collapse-resistant tubing for medical use
Patent 4900314 Issued on February 13, 1990. Estimated Expiration Date: 
February 1, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
February 1, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 1596754 3034510 Flexible, corrugated, plastic tubing having conductive helical bead Variable stiffness tracheal tube Patent #: 4498473 InventorAssigneeApplicationNo. 151030 filed on 02/01/1988US Classes:604/527, Braided or woven strands surrounding lumen604/45Having air or gas venting passageExaminersPrimary: Truluck, Dalton L.International ClassA61M 025/00AbstractA collapse-resistant catheter adapted for medical usage includes a central tube having a smooth outer wall rather than a corrugated outer wall characteristic of prior art collapse-resistant catheters. The tube includes an integral, spiral-shaped outer tube which provides the collapse-resistant characteristic. The spiral tube also provides an additional lumen. The center tube is adapted to provide for a multilumen structure not possible with corrugated prior art structures. The resulting structure, single or multilumen, can be made sufficiently small for insertion into the human body. | |
