Filling material for cushions
Patent 6235391 Issued on May 22, 2001. Estimated Expiration Date: 
November 15, 2019. 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 15, 2019. 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 3074543 3188264 3251728 3426372 3481455 3608961 3922756 Body cushion-receiving seating structure Loose fill packing element and method of making same Flame-retardant polyurethane foam compositions InventorsApplicationNo. 440532 filed on 11/15/1999US Classes:428/367, Including free carbon or carbide or therewith (not as steel)428/304.4, Composite having voids in a component (e.g., porous, cellular, etc.)428/371, Helical or coiled428/377Wound or wrapped core or coating (i.e., spiral or helical)ExaminersPrimary: Edwards, N.Attorney, Agent or FirmForeign Patent References
International ClassD01F 006/70AbstractA resilient material shaped into a bent strand with a preferred length from 1.5 to 7 inches forms a filling element for cushions, pillows and upholstered articles. The strand may be bent so as to have a Z-shape or an S-shape or a V-shape or a C-shape along a portion of its length. The length of the strand is greater than its nominal cross-sectional thickness. A quantity of filling elements (e.g., the filling material), preferably formed from flexible, open cell polyurethane foam, is inserted or blown into a casing for a cushion, pillow or upholstered article. Following compression, the filling elements rebound substantially to their uncompressed state without clumping together or leaving pockets within the casing. | |
