Patent US3863644A successfully refreshed from Google Patents.
US3863644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Smoking articles
Assignee: Brown and Williamson Holdings Inc
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Filing: 1972-10-06
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Granted: 1975-02-04
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Expires: 1992-10-06
Abstract
Abstract The invention relates to a smoking article comprising a rod of smoking material having two or more channels, for instance tubes, of small cross section extending substantially longitudinally of the rod from near the mouthend to points short of the other end, at least two of the said channels being of different lengths. The smoking article may have a smoke filter against which the channels substantially abut.
Inventors
- 👤 Frederick J Hunt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:47
CPC Classifications
A; A24; A24D; A24D1/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
182 words
A smoking article comprising a rod of smoking material and a filter at one end of said rod, at least two combustible tubes of small cross section, open at each end, and extending longitudinally through the rod of smoking material from points closely adjacent the filter to points short of the end of the rod of smoking material opposite the filter, said tubes being of different lengths, the ends of said tubes located at the end of the rod opposite said filter being positioned at such different distances from said rod end so that a programmed air ventilation effect is achieved whereby during the initial puffs a mixture of air and tobacco smoke is delivered through the tubes providing a delivery of a higher TPM smoke to the filter than that which would be delivered in the initial puffs during smoking of the same tobacco column without inclusion of the tubes, and during successive puffs, the ratio of air to tobacco smoke in said mixture is increased as the fire cone moves through the tobacco rod to the ends of the tubes.
Claim 2
Dependent Claim
182 words
A smoking article comprising a rod of smoking material and a filter at one end of said rod, at least two combustible tubes of small cross section, open at each end, and extending longitudinally through the rod of smoking material from points closely adjacent the filter to points short of the end of the rod of smoking material opposite the filter, said tubes being of different lengths, the ends of said tubes located at the end of the rod opposite said filter being positioned at such different distances from said rod end so that a programmed air ventilation effect is achieved whereby during the initial puffs a mixture of air and tobacco smoke is delivered through the tubes providing a delivery of a higher TPM smoke to the filter than that which would be delivered in the initial puffs during smoking of the same tobacco column without inclusion of the tubes, and during successive puffs, the ratio of air to tobacco smoke in said mixture is increased as the fire cone moves through the tobacco rod to the ends of the tubes.
Claim 3
Dependent Claim
24 words
A smoking article as claimed in claim 1, wherein at least one of the tubes is disposed near the central axis of the rod.
Claim 4
Dependent Claim
23 words
A smoking article as claimed in claim 1, wherein at least one of the tubes is disposed near the circumference of the rod.
Claim 5
Dependent Claim
20 words
A smoking article as claimed in claim 1, wherein the tubes have a longitudinal seam sealed by a combustible material.
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) | 1978-02-03 | 1978-08-05 | 1979-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-03 | 1982-08-05 | 1983-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-03 | 1986-08-05 | 1987-02-04 | $7700.00 | Window Closed / Lapsed |