X-ray shield
Patent 4158779 Issued on June 19, 1979. Estimated Expiration Date: 
November 25, 1997. 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.
November 25, 1997. 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 2506342 3569712 3723743 InventorsAssigneeApplicationNo. 05/854855 filed on 11/25/1977US Classes:378/147, Collimator250/515.1, Shields378/152With linear leaf motionExaminersPrimary: Anderson, Bruce C.Attorney, Agent or FirmInternational ClassesA61B 6/10 (20060101)G21K 1/10 (20060101) G21K 1/02 (20060101) G21K 1/00 (20060101) G21F 3/00 (20060101) G21K 1/04 (20060101) Foreign Application Priority Data1976-11-27 DEAbstractA shielding device for the protection of human embryo cells from the effects of radiation during examination by X-ray comprising a radiant absorbent protective screen rotatably secured to a supporting frame, the screen including a central protective plate of predetermined shape; a first plurality of protective displaceable sheets, a second plurality of protective sheets associated with said first protective sheets mounted in pairs and being rotatable on one pair of said first sheets and adjusting means to linearly displace the first protective sheets to vary the covering surface area of the screen. | |
