Patent 4610674 Issued on September 9, 1986. Estimated Expiration Date: August 29, 2005. 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.
A catheter introducer includes a hollow sheath extending continuously from a base end portion thereof to a distal end portion thereof, and a hollow hub having a connection portion for connecting the hub to the sheath in such a manner that the hub and sheath partially overlap. A reinforcing coil body is fitted in the connection portion and extends axially of the sheath from the connection portion toward the distal end of the sheath to a point beyond the connection portion. The hub has a valve for enabling a catheter to be passed therethrough under liquid-tight conditions.
Kolobow et al., "A New Thin-Walled Non-Kinking Catheter", Surg. Oct. 1970, vol. 68, No. 4, pp. 625-626