Security paper for currency and banknotes
Patent 4652015 Issued on March 24, 1987. Estimated Expiration Date: 
December 5, 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.
December 5, 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.Patent References 210089 1929828 Security devices Paper incorporating a partially embedded strip Security features in paper Patent #: 4552617 InventorAssigneeApplicationNo. 06/804825 filed on 12/05/1985US Classes:283/91, Specific spectral transmittance or reflectance162/103, Including solid non-waterlaid preform283/58, Checks283/74, Identifier283/901CONCEALED DATAExaminersPrimary: Bell, Paul A.International ClassesG07D 7/12 (20060101)G07D 7/00 (20060101) G07D 7/02 (20060101) B41M 3/14 (20060101) B42D 15/00 (20060101) D21H 21/40 (20060101) D21H 21/44 (20060101) AbstractSecurity devices in the form of metalized plastic films are incorporated within a security paper such as banknotes and other valuable documents during the papermaking process for viewing solely by means of transmitted light. The devices comprise printing of extreme fine line clarity and high opacity such that legibility is possible by means of transmitted light while remaining completely indiscernable under reflected light. | |
