Celebrity Inventors
Walt Disney was no Mickey Mouse inventor. He devised a serious animation camera which he patented. With the device, his company created "Snow White".
PatentStorm News
Make the Most of PatentStorm
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest patents by subscribing to an RSS feed.
Got questions? Ask a Patent Expert!
Registered users: Manage your profile, comments and alerts.
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) |
