Twist bottom dispenser
Patent 6283339 Issued on September 4, 2001. Estimated Expiration Date: 
March 31, 2020. 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.
March 31, 2020. 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. 541012 filed on 03/31/2000US Classes:222/452, Rotary and/or pivoted only222/142.9, Axially rotary closure for axial outlets222/370, Axial inlet and outlet222/426, Plural traps, nonserial222/430, Of different capacities222/482, Plural and/or single for plural openings222/483, Interlocked controllers and/or closures222/548Rotary, axiallyExaminersPrimary: Kaufman, Joseph A.Assistant: Nicolas, F. Attorney, Agent or FirmInternational ClassG01F 011/28AbstractA two-part dispenser for attachment to the bottom of a cylindrical container for dispensing a pre-calibrated amount of powdered or granular product from the container by twisting or rotating one part of the dispenser with respect to the container. The dispenser comprises a generally cup-shaped member adapted to engage the bottom of the container in fixed relationship therewith and a chambered member that fits within the cup-shaped member and can be rotated with respect to the cup-shaped member to dispense product.Field of SearchApertured sleeve or cap, nonaxial dischargeAxially rotary closure for axial outlets Plural and/or single for plural openings Interlocked controllers and/or closures Variable number exposed and/or variably opened Rotary, axially For both inlet and outlet Rigidly interconnected or unitary cutoffs Rotary and/or pivoted only Axial inlet and outlet Rotary conveyer-type trap chamber Of different capacities Plural traps, nonserial | |
