Gas-exchange sheet members
Patent 4342723 Issued on August 3, 1982. Estimated Expiration Date: 
July 3, 2000. 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.
July 3, 2000. 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 3228877 3522885 3724673 Device for exchanging substances and method of manufacturing the device Patent #: 4176069 InventorsAssigneeApplicationNo. 06/165729 filed on 07/03/1980US Classes:422/48, Membrane210/321.75, Planar membrane210/321.78, Cylindrical membrane96/6Membrane to degasify liquidExaminersPrimary: Spear, Frank A. Jr.Attorney, Agent or FirmInternational ClassA61M 1/16 (20060101)Foreign Application Priority Data1978-11-24 JPAbstractA sheet member of silicone rubber suitable for use in gas-exchange such as oxygenation and decarbonation of blood in an oxygenator of a mechanical heart and lung is proposed.The sheet member of the invention is provided with a plurality of capillary pores extending in parallel and each opening at both ends thereof. The oxygenator is constructed with a plurality of the inventive sheet members arranged in parallel and air is passed through the spaces between the adjacent sheet members while blood is passed through the capillary pores in the sheet members.The efficiency of the gas exchange by use of the above sheet members is further enhanced by providing the sheet member with capillary pores each having an undulating longitudinal cross section comprised of an alternating repetition of wider portions and narrower portions.Field of SearchSpaced wall-type filters | |
