Invention Grant
- Patent Title: Cigarette filter material comprising compounds of iron in high oxidation states
- Patent Title (中): 卷烟过滤材料包含高氧化态铁的化合物
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Application No.: US820502Application Date: 1977-08-01
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Publication No.: US4246910APublication Date: 1981-01-27
- Inventor: Norman B. Rainer , Cynthia V. Bailey
- Applicant: Norman B. Rainer , Cynthia V. Bailey
- Applicant Address: NY New York
- Assignee: Philip Morris Incorporated
- Current Assignee: Philip Morris Incorporated
- Current Assignee Address: NY New York
- Main IPC: A24D3/16
- IPC: A24D3/16 ; B01J20/32 ; B01D53/04 ; B01D59/28 ; C01C3/12
Abstract:
Inert gas-permeable granular support materials impregnated with alkali ferrates wherein the ferrates are iron compounds having an oxidation state of +4, +5, or +6 are disclosed. When they are used as a granular filter material in combination with a tobacco product, hydrogen cyanide can be significantly reduced in the smoke obtained from the tobacco product. Activated carbon or alumina impregnated with sodium permanganate and a basic sodium compound may also be combined with the granular filter material.
Public/Granted literature
- US5790253A Method and apparatus for correcting linearity errors of a moving mirror and stage Public/Granted day:1998-08-04
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