Container closure integrity system
Patent 4502605 Issued on March 5, 1985. Estimated Expiration Date: 
June 29, 2004. 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.
June 29, 2004. 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 ReferencesInventorAssigneeApplicationNo. 06/626180 filed on 06/29/1984US Classes:215/230, Including visual indicia215/203With exhibitive featureExaminersPrimary: Pollard, Steven M.Attorney, Agent or FirmInternational ClassesB65D 55/06 (20060101)B65D 55/02 (20060101) AbstractA container closure integrity indicator having a first component comprised of a sheet of absorbent material permeated with an indicator dye in solution with a volatile solvent, and a second component comprised of a sheet of absorbent material permeated with a volatile activator solution, with preferably has a pH outside of the range of 5-7. The two components initially are sealed together, between a closed container surface and a superposed transparent cap member, so that the resulting liquid phase defined by the components characterized by a color, which is a function of any change to the liquid phase pH with respect to the relative amounts of dye, volatile solvent solution, and volatile activator solution. | |
