Patent US3847161A successfully refreshed from Google Patents.
US3847161A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filtered cigarettes
Assignee: Individual
•
Filing: 1973-04-20
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Granted: 1974-11-12
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Expires: 1993-04-20
Abstract
Abstract A filtered cigarette in which the upstream end of the tobacco smoke filter is disposed along a single inclined plane so that there is a variable drawing resistance along different longitudinal planes of the filter and a progressive build-up of tars and nicotine on the inclined plane and in which the space between the tobacco and the upstream end of the filter provides a chamber in which the tobacco smoke may be cooled by air inhaled through apertures in the cigarette wrapper. Additionally, there is a relatively even draw resistance throughout the entire smoking cycle.
Inventors
- 👤 D Morgenstern
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:01
CPC Classifications
A; A24; A24D; A24D3/00; A24D3/04; A24D3/043
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
178 words
A filtered cigarette comprising: a. a tobacco section of cylindrical configuration having an upstream end and a downstream end; b. a tobacco smoke filter having an upstream forward end and a cylindrical mouthpiece rear end; and c. a wrapper encircling said tobacco section and said filter and having means providing at least one aperture therethrough; said upstream end of said filter being disposed along a single plane inclined with respect to the longitudinal axis of the cigarette, the forwardmost portion of said inclined plane being adjacent the downstream end of said tobacco smoke section and rearmost portion of said inclined plane being significantly displaced from said forwardmost portion at a point approximately 180* from said forwardmost portion; said inclined plane making an angle of about 20* to about 70* measured with respect to a plane perpendicular to the longitudinal axis of the cigarette; said downstream end portion, said inclined plane, and said wrapper forming an air mixing chamber; said at least one aperture means being substantially in flow communication between said air mixing chamber and the outside atmosphere.
Claim 2
Dependent Claim
178 words
A filtered cigarette comprising: a. a tobacco section of cylindrical configuration having an upstream end and a downstream end; b. a tobacco smoke filter having an upstream forward end and a cylindrical mouthpiece rear end; and c. a wrapper encircling said tobacco section and said filter and having means providing at least one aperture therethrough; said upstream end of said filter being disposed along a single plane inclined with respect to the longitudinal axis of the cigarette, the forwardmost portion of said inclined plane being adjacent the downstream end of said tobacco smoke section and rearmost portion of said inclined plane being significantly displaced from said forwardmost portion at a point approximately 180* from said forwardmost portion; said inclined plane making an angle of about 20* to about 70* measured with respect to a plane perpendicular to the longitudinal axis of the cigarette; said downstream end portion, said inclined plane, and said wrapper forming an air mixing chamber; said at least one aperture means being substantially in flow communication between said air mixing chamber and the outside atmosphere.
Claim 3
Dependent Claim
56 words
The filtered cigarette of claim 1 wherein said, at least, one aperture is in the form of a vent and there are a plurality of said vents in direct communication with said upstream end and said outside atmosphere and also a plurality of said vents in communication with said air mixing chamber and said outside atmosphere.
Claim 4
Dependent Claim
45 words
The filtered cigarette of claim 2 wherein said vents are circumferentially formed in, at least, a single series extending through 360* about said wrapper and are located from said downstream end less than four-fifths the total distance between said forwardmost portion and said rearmost portion.
Claim 5
Dependent Claim
42 words
The filtered cigarette of claim 3 wherein there are, at least, two of said series of vents, at least one of which is located from said downstream end less than three-fifths the total distance between said forwardmost portion and said rearmost portion.
Claim 6
Dependent Claim
30 words
The filtered cigarette of claim 1 wherein said inclined plane makes an angle of about 30* to about 60* measured with respect to a plane perpendicular to said longitudinal axis.
Claim 7
Dependent Claim
30 words
The filtered cigarette oF claim 1 wherein said inclined plane makes an angle of about 40* to about 55* measured with respect to a plane perpendicular to said longitudinal axis.
Claim 8
Dependent Claim
35 words
The filtered cigarette of claim 1 wherein a cylindrical additional filter element is disposed between said downstream end of said tobacco section and said forwardmost point of said upstream end of said tobacco smoke filter.
Claim 9
Dependent Claim
28 words
The filtered cigarette of claim 7 wherein said wrapper has at least one aperture which is in communication between said outside atmosphere and said cylindrical additional filter element.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-11 | 1978-05-13 | 1978-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-11 | 1982-05-13 | 1982-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-11 | 1986-05-13 | 1986-11-12 | $7700.00 | Window Closed / Lapsed |