Patent US3705588A successfully refreshed from Google Patents.
US3705588A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemically modified film covering for apertured smoking product wrapper
Assignee: Philip Morris USA Inc
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Filing: 1971-07-06
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Granted: 1972-12-12
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Expires: 1991-07-06
Abstract
Abstract The disclosure relates to a film covering for a smoking product wrapper, such as a cigarette wrapper. The wrapper is either porous, or is deliberately perforated with vents or apertures. These openings or vents are covered with a polymeric film made of a polyalkalene oxide, polyvinyl alcohol or copolymer thereof containing butadiene or isoprene units as well as natural gums and resins that has been submitted to a degradation operation. The degradation is chemically produced utilizing an oxidizer/free-radical generator. The degradation facilitates and expedites the removal of film over the apertures by smoke components so that air is permitted to dilute the smoke during the later stages of smoking.
Inventors
- 👤 Ronald A Tamol
- 👤 Leo F Meyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:18
CPC Classifications
A; A24; A24D; A24D1/00; A24D1/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
46 words
A cigarette wrapper of the like comprising a combustible material having apertures therein and a benzoyl peroxide degraded polyethylene oxide filling material normally closing said apertures, said film having a thickness of about 5 to 15 microns, the degraded film permitting rapid breakdown by smoke components.
Claim 2
Dependent Claim
21 words
The product of claim 2, in which the polyethylene oxide polymer has a molecular weight of about 150,000 to about 600,000.
Claim 3
Dependent Claim
63 words
The process comprising mixing a polyethylene oxide solution with about 2 to 5 percent by weight of an oxidizer, free-radical generating degradation agent, coating the resin solution on a tobacco wrapper having spaced apertures therein, covering said apertures and said wrapper with a thin continuous film of resin, and then drying the coated wrapper, the dried film being 5 to 15 microns thick.
Claim 4
Dependent Claim
27 words
The process of claim 4, in which the degradation agent is benzoyl peroxide and the degradation is carried out over a period of at least 24 hours.
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) | 1975-12-12 | 1976-06-12 | 1976-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-12 | 1980-06-12 | 1980-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-12 | 1984-06-12 | 1984-12-12 | $7700.00 | Window Closed / Lapsed |