Did You Know...
...that the Slinky toy was the result of a failed attempt by engineer Richard James to produce an antivibration device for ship instruments? His goal was to develop a spring that would instantaneously counterbalance the wave motion that rocks a ship at sea. Instead, he developed the Slinky.
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US Patent 4729390 - Tobacco smoke filtering material
US Patent Issued on March 8, 1988
Estimated Patent Expiration Date:
July 31, 2005Estimated 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.
Estimated Patent Expiration Date:
July 31, 2005Estimated 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.AbstractDisclosed are tobacco smoke filtering materials for selectively removing deleterious material from tobacco smoke without at the same time removing desirable smoke vapors which contribute to aroma and taste. The filtering materials comprise a fibrous article, the fibers of which have a coating on the surfaces thereof comprising a compound of the formula ##STR1## wherein R1 is the residue of a straight chain fatty acid having 8-22 carbon atoms and R2 is OH or ##STR2## wherein Ac is an acetyl group. | InventorApplicationNo. 06/760802 filed on 07/31/1985US Classes:131/331, SMOKE SEPARATOR OR TREATER131/332, Having a polymer131/343, Plasticizer or adhesive coating131/345Including a cellulose ester or etherField of Search131/331, SMOKE SEPARATOR OR TREATER131/332, Having a polymer131/343, Plasticizer or adhesive coating131/345Including a cellulose ester or etherExaminersPrimary: Millin, V.Attorney, Agent or FirmUS Patent References3417759, 3424173International ClassesA24D 3/14 (20060101)A24D 3/00 (20060101) |
