Patent US5095348A successfully refreshed from Google Patents.
Patent US3756249A successfully refreshed from Google Patents.
US3756249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Smokable article having internal air passageway
Assignee: Kimberly Clark Corp
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Filing: 1971-09-23
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Granted: 1973-09-04
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Expires: 1991-09-23
Abstract
Abstract A smokable article, such as a cigarette, in which the wrapper surrounds both a mass of tobacco filler and a longitudinally extending tube, the latter serving as a passageway for air during smoking. The tube preferably extends for the full length of the smokable article, but air flow through it is obstructed during the initial burning of the article. The tube may be provided along its length with two or more partial obstructions to air flow, the air flow permitted by each obstruction being greater the farther it is from the burning end of the article. Preferably, the tube is formed of combustible material, such as reconstituted tobacco.
Inventors
- 👤 W Selke
- 👤 R Kulick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:51
CPC Classifications
A; A24; A24D; A24D1/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
106 words
A smokable article comprising a wrapper surrounding both an elongated mass of tobacco filler and a tube extending longitudinally of the article, said tube being empty for at least a portion of its length so that said empty portion serves as an unobstructed flow passageway for air during smoking of the article, and means spaced apart along the length of said tube for at least partially obstructing air flow through said tube, each of said obstructing means being formed to permit greater air flow than the next preceding obstructing means closer to the end of the article which is first burned when the article is smoked.
Claim 2
Dependent Claim
106 words
A smokable article comprising a wrapper surrounding both an elongated mass of tobacco filler and a tube extending longitudinally of the article, said tube being empty for at least a portion of its length so that said empty portion serves as an unobstructed flow passageway for air during smoking of the article, and means spaced apart along the length of said tube for at least partially obstructing air flow through said tube, each of said obstructing means being formed to permit greater air flow than the next preceding obstructing means closer to the end of the article which is first burned when the article is smoked.
Claim 3
Dependent Claim
16 words
A smokable article as defined in claim 1 wherein said tube is formed of reconstituted tobacco.
Claim 4
Dependent Claim
32 words
A smokable article as defined in claim 1 wherein each said obstructing means is a dent in said tube at least partially closing the tube interior in the vicinity of said dent.
Claim 5
Dependent Claim
36 words
A smokable article as defined in claim 1 wherein said obstructing means is a cut-out in said tube between its ends, said cut-out permitting tobacco filler to enter said tube in the region of said cut-out.
Claim 6
Dependent Claim
23 words
A smokable article as defined in claim 1 wherein each of said obstructing means is a dent in the side of said tube.
Claim 7
Dependent Claim
38 words
A smokable article as defined in claim 1 wherein said obstructing means closest to the end of the article which is first burned completely obstructs air flow through said tube during the initial burning of the smokable article.
Claim 8
Dependent Claim
16 words
A smokable article as defined in claim 1 wherein said tube is formed of combustible material.
References Cited (Backward Citations)
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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) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |