US4763674A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and device for controlling hydrogen cyanide and nitric oxide concentrations in cigarette smoke
Assignee: Hoechst Celanese Chemical Co
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Filing: 1986-04-16
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Granted: 1988-08-16
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Expires: 2006-04-16
Abstract
Abstract Method for reducing normal concentrations of hydrogen cyanide and/or nitrogen oxide by-products in cigarette smoke, by using, as garniture feed for a cigarette filter rod-making apparatus, one or more substrates, one or more surfaces thereof being treated by applying thereto an effective amount of at least one of (A) a solution, emulsion or dispersion of at least one of sodium bicarbonate, sodium carbonate, potassium permanganate, manganese dioxide in a nonionic spin solution; (B) glycerol triacetate; and corresponding filter element and cigarette utilizing a filter formed of such substrate(s).
Inventors
- 👤 Michael D. Lelah
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:31
CPC Classifications
A; A24; A24D; A24D3/00; A24D3/06; A24D3/08; A24D3/14
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
74 words
A method for selectively removing or controlling toxic gas components within cigarette smoke, comprising utilizing, as a filter element, the product of a filter rod-making apparatus using at least one polyolefin fiber- or film-containing garniture feed treated with an effective amount of at least one active modifier component of the group sodium carbonate, potassium permanganate and manganese dioxide; said active modifier component being dissolved or dispersed in a non-ionic spin solution and glycerol triacetate.
Claim 2
Independent Claim
74 words
A method for selectively removing or controlling toxic gas components within cigarette smoke, comprising utilizing, as a filter element, the product of a filter rod-making apparatus using at least one polyolefin fiber- or film-containing garniture feed treated with an effective amount of at least one active modifier component of the group sodium carbonate, potassium permanganate and manganese dioxide; said active modifier component being dissolved or dispersed in a non-ionic spin solution and glycerol triacetate.
Claim 3
Dependent Claim
44 words
The method of claim 1 wherein the modifier components are applied to separate substrate surfaces, and said substrate comprises at least one of (a) an open fiber tow, (b) a sliver, (c) a ribbon of nonwoven material or (d) a web of fibrillated film.
Claim 4
Dependent Claim
12 words
A filter element obtained in accordance with the method of claim 2.
Claim 5
Dependent Claim
18 words
A cigarette comprising a tobacco rod in serial combination with a filter obtained in accordance with claim 3.
Claim 6
Dependent Claim
17 words
The method of claim 1, wherein modifier components are applied to opposite sides of a polyolefin-containing substrate.
Claim 7
Dependent Claim
11 words
A filter-element obtained in accordance with the method of claim 5.
Claim 8
Dependent Claim
18 words
A cigarette comprising a tobacco rod in serial combination with a filter obtained in accordance with claim 6.
Claim 9
Dependent Claim
19 words
The method of claim 1, wherein the modifier components are separately applied to different substrates by dipping or spraying.
Claim 10
Dependent Claim
12 words
A filter element obtained in accordance with the method of claim 8.
Claim 11
Dependent Claim
18 words
A cigarette comprising a tobacco rod in serial combination with a filter obtained in accordance with claim 9.
Claim 12
Dependent Claim
12 words
A filter element obtained in accordance with the method of claim 1.
Claim 13
Dependent Claim
18 words
A cigarette comprising a tobacco rod in serial combination with a filter obtained in accordance with claim 11.
Claim 14
Independent Claim
96 words
A method for selectively removing or controlling toxic gas components within cigarette smoke, comprising utilizing, as a filter element, the product of a filter rod-making apparatus using at least one polyolefin fiber- or film-containing garniture feed treated with an effective amount of at least one active modifier component selected from the group consisting of sodium carbonate, potassium permanganate and manganese dioxide; said active modifier component being dissolved or dispersed in a non-ionic spin solution of a member selected from the group consisting of a fatty acid monoester and a fatty acid diester of a polyhydroxy alcohol.
Claim 15
Independent Claim
96 words
A method for selectively removing or controlling toxic gas components within cigarette smoke, comprising utilizing, as a filter element, the product of a filter rod-making apparatus using at least one polyolefin fiber- or film-containing garniture feed treated with an effective amount of at least one active modifier component selected from the group consisting of sodium carbonate, potassium permanganate and manganese dioxide; said active modifier component being dissolved or dispersed in a non-ionic spin solution of a member selected from the group consisting of a fatty acid monoester and a fatty acid diester of a polyhydroxy alcohol.
Claim 16
Dependent Claim
21 words
The method of claim 13 wherein polyolefin-containing substrate is pretreated by corona or plasma discharge before application of active modifier component.
Claim 17
Dependent Claim
21 words
The method of claim 13, wherein the garniture feed is a nonwoven material in combination with at least one other substrate.
Claim 18
Dependent Claim
28 words
A filter element obtained in accordance with the method of claim 15 in which the other substrate is in complete or partial register for insertion into a garniture.
Claim 19
Dependent Claim
12 words
A filter element obtained in accordance with the method of claim 13.
Claim 20
Dependent Claim
18 words
A cigarette comprising a tobacco rod in serial combination with a filter obtained in accordance with claim 7.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-08-16 | 1992-02-15 | 1992-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-16 | 1996-02-15 | 1996-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-16 | 2000-02-15 | 2000-08-16 | $7700.00 | Window Closed / Lapsed |