US4881555A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Smoking articles
Assignee: Imperial Tobacco Ltd
•
Filing: 1988-09-16
•
Granted: 1989-11-21
•
Expires: 2008-09-16
Abstract
Abstract There is provided a cigarette 10 having a tobacco rod 12 and a filter plug 14. Between the rod 12 and the plug 14 is disposed a porous element 16 containing an aroma precursor which, when the cigarette smoulders down to the butt, is burnt by the coal to release an agreeable aroma into the atmosphere.
Inventors
- 👤 Anthony J. N. Bolt
- 👤 John S. Sadd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:54
CPC Classifications
A; A24; A24D; A24D1/00; A24D1/12; A24D3/00; A24D3/04; A24D3/048
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
83 words
A smoking article comprising a rod of smoking material, a heat sensitive aroma-release element disposed adjacent an end of the smoking material, said heat sensitive aroma release element releasing the aroma into the ambient atmosphere when the burning smoking material reaches the vicinity of the element so that the aroma is relased only after substantially all the smoking material is combusted, said heat sensitive aroma release element being combustible and adapted to smoulder under the influence of heat from the burning smoking material.
Claim 2
Dependent Claim
83 words
A smoking article comprising a rod of smoking material, a heat sensitive aroma-release element disposed adjacent an end of the smoking material, said heat sensitive aroma release element releasing the aroma into the ambient atmosphere when the burning smoking material reaches the vicinity of the element so that the aroma is relased only after substantially all the smoking material is combusted, said heat sensitive aroma release element being combustible and adapted to smoulder under the influence of heat from the burning smoking material.
Claim 3
Dependent Claim
44 words
A smoking article as claimed in claim 1 and further including a filter, the aroma release element being located between the filter and the rod of smoking material, a tipping paper extending from the filter to the rod and covering the aroma release element.
Claim 4
Dependent Claim
37 words
A smoking article as claimed in claim 2 in that the element is provided by a mixture of an odourant and a fuel disposed in a void between the filter plug and the rod of smoking material.
Claim 5
Dependent Claim
26 words
A smoking article as claimed in claim 1 characterised in that the smoking material is tobacco leaf, reconstituted tobacco or tobacco substitutes, or any combination thereof.
Claim 6
Dependent Claim
33 words
A smoking article as claimed in claim 4 characterised in that the aroma release element is porous to allow the passage of smoke from the rod of smoking material into the smoker's mouth.
Claim 7
Dependent Claim
33 words
A smoking article as claimed in claim 1 characterised in that the resistance-to-draw or pressure drop presented by the element is either zero or very low compared with the resistance-to-draw of conventional cigarettes.
Claim 8
Dependent Claim
29 words
A smoking article as claimed in claim 6 characterised in that the article incorporates one or more discrete channels to permit passage of smoke past and/or through the element.
Claim 9
Dependent Claim
21 words
A smoking article as claimed in claim 6 in that the element is provided by highly porous paper enclosing the odourant.
Claim 10
Dependent Claim
28 words
A smoking article as claimed in claim 1 characterised in that the element acts as a filter and retains smoke components derived from the rod of smoking material.
Claim 11
Dependent Claim
27 words
A smoking article as claimed in claim 1 characterised in that the element includes an odourant for releasing a volatile aroma and a fuel for assisting smoulder.
Claim 12
Dependent Claim
18 words
A smoking article as claimed in claim 10 characterised in that the element includes a burn modifying agent.
Claim 13
Dependent Claim
20 words
A smoking article as claimed in claim 10 characterised in that the element includes a filler and a binding agent.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-11-20 | 1993-05-22 | 1993-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-20 | 1997-05-22 | 1997-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-20 | 2001-05-22 | 2001-11-21 | $7700.00 | Window Closed / Lapsed |