US4667814A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxygen absorbent packet
Assignee: Mitsubishi Gas Chemical Co Inc
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Filing: 1985-10-22
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Granted: 1987-05-26
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Expires: 2005-10-22
Abstract
Abstract In an oxygen absorbent packet, an oxygen absorbent containing moisture is received in the cup like plastic container and an air-permeable layer made of paper is adhered to the opening section of the container. A substantially air-impermeable layer is formed on the outer surface of the air-permeable layer, whereby the oxygen absorbent absorbs oxygen through the peripheral side edge of the air-permeable layer.
Inventors
- 👤 Syuji Wakamatsu
- 👤 Toshio Komatsu
- 👤 Yoshiaki Inoue
- 👤 Yoshihiko Harima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:45
CPC Classifications
A; A61; A61J; A61J1/00; B; B65; B65D; B65D81/00; B65D81/24; B65D81/26; B65D81/266; B65D81/268
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
160 words
An oxygen absorbent packet comprising: (a) an oxygen absorbent containing moisture; (b) a cup-like plastic container having an opening section defining an opening, in which the oxygen absorbent is received; and (c) a multilayer film covering said opening comprising: (i) an air-permeable layer having inner and outer surfaces and a peripheral side edge, the air-permeable layer being made of a material selected from the group consisting of paper, nonwoven fabric and microporous film, the air-permeable layer covering said opening of said container so as to provide air permeability with a relatively high degree of resistance to humidity-permeation; (ii) means for adhering said inner surface of said air-permeable layer to said opening section of said container; and (iii) a substantially air-impermeable layer made of a material having a relatively high degree of resistance to air-permeation and formed solely on the outer surface of the air-permeable layer, whereby the oxygen absorbent absorbs oxygen through the peripheral side edge of the air-permeable layer.
Claim 2
Dependent Claim
160 words
An oxygen absorbent packet comprising: (a) an oxygen absorbent containing moisture; (b) a cup-like plastic container having an opening section defining an opening, in which the oxygen absorbent is received; and (c) a multilayer film covering said opening comprising: (i) an air-permeable layer having inner and outer surfaces and a peripheral side edge, the air-permeable layer being made of a material selected from the group consisting of paper, nonwoven fabric and microporous film, the air-permeable layer covering said opening of said container so as to provide air permeability with a relatively high degree of resistance to humidity-permeation; (ii) means for adhering said inner surface of said air-permeable layer to said opening section of said container; and (iii) a substantially air-impermeable layer made of a material having a relatively high degree of resistance to air-permeation and formed solely on the outer surface of the air-permeable layer, whereby the oxygen absorbent absorbs oxygen through the peripheral side edge of the air-permeable layer.
Claim 3
Dependent Claim
29 words
A packet according to claim 1, wherein said container is made of a material selected from the group consisting of polyethylene, polypropylene, polyvinyl chloride, polyethylene terephthalate, polyamide and polystyrene.
Claim 4
Dependent Claim
31 words
A packet according to claim 1, wherein said air-permeable layer is made of one of paper and nonwoven fabric of a thickness from 20 g/m 2 to 100 g/m 2 .
Claim 5
Dependent Claim
25 words
A packet according to claim 1, wherein said air-permeable layer is made of a microporous film of a thickness from 50 μm to 200 μm.
Claim 6
Dependent Claim
37 words
A packet according to claim 1, wherein said air-impermeable layer comprises a film made of a material selected from the group consisting of polyethylene terephthalate, polyamide, polyvinyl alcohol, polyethylene, polypropylene, polyvinyl chloride and an ethylene-vinyl acetate copolymer.
Claim 7
Dependent Claim
39 words
A packet according to claim 1, wherein said air-impermeable layer comprises a multilayer film made of materials which are selected from the group consisting of, polyethylene terephthalate, polyamide, polyvinyl alcohol, polyethylene, polypropylene, polyvinyl chloride and an ethylene-vinyl acetate copolymer.
Claim 8
Dependent Claim
41 words
A packet according to claim 1, wherein said air-impermeable layer comprises a single coating layer which is made of a material selected from the group consisting of nitrocellulose, cellulose acetate, polyvinyl chloride-acetate, polyurethane, polyethylene, an ethylene-vinyl acetate copolymer and polyvinylidene chloride.
Claim 9
Dependent Claim
14 words
A packet according to claim 1, wherein pores are formed in the air-impermeable layer.
Claim 10
Dependent Claim
16 words
A packet according to claim 1, wherein an aluminum film is formed on said air-impermeable layer.
Claim 11
Dependent Claim
19 words
A packet according to claim 9, wherein pores are formed in said aluminum film and in said air-impermeable layer.
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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) | 1990-05-25 | 1990-11-24 | 1991-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-25 | 1994-11-24 | 1995-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-25 | 1998-11-24 | 1999-05-26 | $7700.00 | Window Closed / Lapsed |