US3626952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Smoke filter
Assignee: RJ Reynolds Tobacco Co
•
Filing: 1970-04-21
•
Granted: 1971-12-14
•
Expires: 1990-04-21
Abstract
Abstract A tobacco smoke filter is provided which includes a hollow cylindrical member formed of smoke-impervious material. The member includes a pair of hingedly connected semicylindrical sections and a pair of perforated panels hingedly connected to the semicylindrical sections and disposed therebetween. One of the panels and one of the semicylindrical members cooperate to form a first passageway having an open upstream end and a closed downstream end. The other panel and semicylindrical member cooperate to form a second passageway having a closed upstream end and an open downstream end. The passageways are in communication with one another only through the perforated panels. Smoke is adapted to pass through the perforations of the panel defining the first passageway as a plurality of highvelocity jets which impinge against the adjacent surface of the panel defining the second passageway.
Inventors
- 👤 Karol J Mysels
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:20
CPC Classifications
A; A24; A24D; A24D3/00; A24D3/04; A24D3/045
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
173 words
A smoke filter for attachment to one end of a tobacco rod comprising a hollow cylindrical member formed of smoke-impervious material; said member including first and second semicylindrical sections, and perforated first and second panels; said sections and panels being foldably interconnected whereby said sections are disposed in inverted substantially superposed relation and said panels are arranged in closely spaced substantially parallel relation and disposed intermediate said inverted sections; the first section and the first panel cooperating with one another to form a first passageway having an open upstream end and a closed downstream end, the second section and the second panel cooperating with one another to form a second passageway having a closed upstream end and an open downstream end, said first and second passageways communicating with one another only through said perforated panels; the perforations of said first panel being of a size whereby the smoke passes therethrough as a plurality of high-velocity jets which impinge against the adjacent surface of the closely spaced second panel before entering said second passageway.
Claim 2
Dependent Claim
173 words
A smoke filter for attachment to one end of a tobacco rod comprising a hollow cylindrical member formed of smoke-impervious material; said member including first and second semicylindrical sections, and perforated first and second panels; said sections and panels being foldably interconnected whereby said sections are disposed in inverted substantially superposed relation and said panels are arranged in closely spaced substantially parallel relation and disposed intermediate said inverted sections; the first section and the first panel cooperating with one another to form a first passageway having an open upstream end and a closed downstream end, the second section and the second panel cooperating with one another to form a second passageway having a closed upstream end and an open downstream end, said first and second passageways communicating with one another only through said perforated panels; the perforations of said first panel being of a size whereby the smoke passes therethrough as a plurality of high-velocity jets which impinge against the adjacent surface of the closely spaced second panel before entering said second passageway.
Claim 3
Dependent Claim
24 words
The smoke filter of claim 1 wherein the semicylindrical sections and the perforated panels comprising said hollow cylindrical member are of a unitary construction.
Claim 4
Dependent Claim
25 words
The smoke filter of claim 1 wherein the perforations of said second panel are of substantially greater size than the perforations of said first panel.
Claim 5
Dependent Claim
18 words
The smoke filter of claim 1 wherein each semicylindrical section is provided with an inwardly projecting reinforcing baffle.
Claim 6
Dependent Claim
44 words
The smoke filter of claim 1 including a cylindrical plug of fibrous porous material disposed in abutting aligned relation with respect to the downstream end of said hollow cylindrical member, and smoke impervious means for retaining said cylindrical member and plug in assembled relation.
Claim 7
Dependent Claim
36 words
The smoke filter of claim 1 wherein said semicylindrical sections each have an elongated edge thereof foldably interconnected to one another, and the panels are foldably connected to the other elongated edges of said semicylindrical sections.
Claim 8
Dependent Claim
31 words
The smoke filter of claim 1 wherein at least one of said panels carries spacer means engaging the other panel and maintaining said panels in a predetermined closely spaced parallel relation.
Claim 9
Dependent Claim
44 words
The smoke filter of claim 1 wherein said first panel includes a transversely extending smoke barrier disposed adjacent the downstream end of said first passageway, and said second panel includes a transversely extending smoke barrier disposed adjacent the upstream end of said second passageway.
Claim 10
Dependent Claim
54 words
The smoke filter of claim 1 wherein said first semicylindrical section includes a transversely extending smoke barrier disposed adjacent to and closing off the downstream end of said first passageway, and said second semicylindrical section includes a transversely extending smoke barrier disposed adjacent to and closing off the upstream end of said second passageway.
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) | 1974-12-13 | 1975-06-14 | 1975-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-13 | 1979-06-14 | 1979-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-13 | 1983-06-14 | 1983-12-14 | $7700.00 | Window Closed / Lapsed |