US4579223A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxygen absorbent packet
Assignee: Mitsubishi Gas Chemical Co Inc
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Filing: 1984-01-27
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Granted: 1986-04-01
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Expires: 2004-01-27
Abstract
Abstract An oxygen absorbent packet comprising an oxygen absorbent packaged and sealed in a double packaging material 6 comprised of a gas-permeable outer material layer 1 composed of a plastic film or transparent paper, a gas-permeable sealing layer 2, an inner material layer 3 composed of gas-permeable paper or nonwoven cloth, and a gas-permeable sealing layer 4, and also containing an air layer 5 between layers and 1 and 2 or between layers 2 and 3.
Inventors
- 👤 Sadao Otsuka
- 👤 Takehiko Moriya
- 👤 Toshio Komatsu
- 👤 Akira Katada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:06
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/10; B65; B65D; B65D81/00; B65D81/24; B65D81/26; B65D81/266; B65D81/268; B32B27/12; B32B5/00; B32B5/02; B32B5/022; B32B2307/00; B32B2307/30; B32B2307/31; B32B2307/70; B32B2307/724; B32B2307/74; Y; Y10; Y10T; Y10T428/00; Y10T428/23
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
68 words
An oxygen absorbent packet comprising an oxygen absorbent packaged and sealed in a double packaging material, said double packaging comprising four layers on each side of said oxygen absorbent, a gas-permeable outer material layer, a first gas-permeable sealing layer, a gas-permeable inner material layer, and a second gas-permeable sealing layer, said packet containing an air layer between said gas-permeable outer material layer and said first gas-permeable sealing layer.
Claim 2
Dependent Claim
68 words
An oxygen absorbent packet comprising an oxygen absorbent packaged and sealed in a double packaging material, said double packaging comprising four layers on each side of said oxygen absorbent, a gas-permeable outer material layer, a first gas-permeable sealing layer, a gas-permeable inner material layer, and a second gas-permeable sealing layer, said packet containing an air layer between said gas-permeable outer material layer and said first gas-permeable sealing layer.
Claim 3
Dependent Claim
42 words
The oxygen absorbent packet of claim 1 wherein said gas-permeable outer material layer is selected from the group consisting of plastic film and transparent paper and said gas-permeable inner material layer is selected from the group consisting of paper and nonwoven cloth.
Claim 4
Dependent Claim
25 words
The oxygen absorbent packet of claim 2 wherein said outer material layer is selected from the group consisting of polyethylene terephthalate film and polyamide film.
Claim 5
Dependent Claim
28 words
The oxygen absorbent packet of claim 2 wherein said inner material layer is selected from the group consisting of Japanese paper, rayon mixed paper, and polyamide nonwoven cloth.
Claim 6
Dependent Claim
35 words
The oxygen absorbent packet of claim 2 wherein said first sealing layer is hot melt adhesives selected from the group consisting of holt melt emulsions, ionomer latexes, ionomer emulsions, polyethylene emulsions, or ethylene-vinylacetate copolymer emulsions.
Claim 7
Dependent Claim
28 words
The oxygen absorbent packet of claim 2 wherein said gas-permeable inner material layer comprises water- and oil-resistant paper and said first gas-permeable sealing layer comprises ethylene vinylacetate copolymer.
Claim 8
Dependent Claim
28 words
The oxygen absorbent packet of claim 2 wherein said second gas-permeable sealing layer is selected from the group consisting of ethylene vinyl-acetate copolymer, linear low-density polyethylene and ionomer.
Claim 9
Dependent Claim
16 words
The oxygen absorbent packet of claim 2 wherein said oxygen absorbent is an iron-based oxygen absorbent.
Claim 10
Dependent Claim
15 words
The oxygen absorbent packet of claim 2 wherein said packet is sealed on three sides.
Claim 11
Dependent Claim
22 words
The oxygen absorbent packet of claim 2 wherein printing has been applied to the back surface of said gas-permeable outer material layer.
Claim 12
Dependent Claim
80 words
The oxygen absorbent packet of claim 2 wherein said gas-permeable outer material layer comprises polyethylene terephthalate film, said first gas-permeable sealing layer comprises hot melt adhesives, said gas-permeable inner material layer comprises Japanese paper and said second gas-permeable sealing layer comprises linear low-density polyethylene, and wherein said gas-permeable inner material layer is laminated on one side to said gas-permeable first sealing layer and said gas-permeable inner material layer is laminated on the other side to said second gas-permeable sealing layer.
Claim 13
Dependent Claim
20 words
The oxygen absorbent packet of claim 2 wherein said second gas-permeable sealing layer comprises a polyethylene film provided with cracks.
Claim 14
Dependent Claim
69 words
An oxygen absorbent packet comprising an oxygen absorbent packaged and sealed in a double packaging material, said double packaging material comprising four layers on each side of said oxygen absorbent, a gas-permeable outer material layer, a first gas-permeable sealing layer, a gas-permeable inner material layer, and a second gas-permeable sealing layer, said packet containing an air layer between said first gas-permeable sealing member and said gas-permeable inner material layer.
Claim 15
Dependent Claim
69 words
An oxygen absorbent packet comprising an oxygen absorbent packaged and sealed in a double packaging material, said double packaging material comprising four layers on each side of said oxygen absorbent, a gas-permeable outer material layer, a first gas-permeable sealing layer, a gas-permeable inner material layer, and a second gas-permeable sealing layer, said packet containing an air layer between said first gas-permeable sealing member and said gas-permeable inner material layer.
Claim 16
Dependent Claim
42 words
The oxygen absorbent packet of claim 13 wherein said gas-permeable outer material layer is selected from the group consisting of plastic film and transparent paper and said gas-permeable inner material layer is selected from the group consisting of paper and nonwoven cloth.
Claim 17
Dependent Claim
25 words
The oxygen absorbent packet of claim 14 wherein said outer material layer is selected from the group consisting of polyethylene terephthalate film and polyamide film.
Claim 18
Dependent Claim
28 words
The oxygen absorbent packet of claim 14 wherein said inner material layer is selected from the group consisting of Japanese paper, rayon mixed paper, and polyamide nonwoven cloth.
Claim 19
Dependent Claim
24 words
The oxygen absorbent packet of claim 14 wherein said first sealing layer is selected from the group consisting of polyethylene and ethylene vinylacetate copolymer.
Claim 20
Dependent Claim
28 words
The oxygen absorbent packet of claim 14 wherein said gas-permeable inner material layer comprises water- and oil-resistant paper and said first gas-permeable sealing layer comprises ethylene vinylacetate copolymer.
Claim 21
Dependent Claim
28 words
The oxygen absorbent packet of claim 14 wherein said second gas-permeable sealing layer is selected from the group consisting of ethylene vinyl-acetate copolymer, linear low-density polyethylene, and ionomer.
Claim 22
Dependent Claim
16 words
The oxygen absorbent packet of claim 14 wherein said oxygen absorbent is an iron-based oxygen absorbent.
Claim 23
Dependent Claim
15 words
The oxygen absorbent packet of claim 14 wherein said packet is sealed on three sides.
Claim 24
Dependent Claim
21 words
The oxygen absorbent packet of claim 21 wherein said gas-permeable outer material layer is larger than said gas-permeable inner material layer.
Claim 25
Dependent Claim
22 words
The oxygen absorbent packet of claim 14 wherein printing has been applied to the back surface of said gas-permeable outer material layer.
Claim 26
Dependent Claim
72 words
The oxygen absorbent packet of claim 14 wherein said gas-permeable outer material layer comprises polyethylene terephthalate film, said first gas-permeable sealing layer comprises polyethylene film, said gas-permeable inner material layer comprises Japanese paper and said second gas-permeable sealing layer comprises linear low-density polyethylene, and wherein said gas-permeable outer material layer is laminated to said gas-permeable first sealing layer and said gas-permeable inner material layer is laminated to said second gas-permeable sealing layer.
Claim 27
Dependent Claim
20 words
The oxygen absorbent packet of claim 14 wherein said second gas-permeable sealing layer comprises a polyethylene film provided with cracks.
References Cited (Backward Citations)
CA698776A
Cited
JPS54103193A
Cited
US4287995A
Cited
US4421235A
Cited
JPS55109428A
Cited
US4332845A
Cited
JPS56124440A
Cited
JPS56124441A
Cited
JPS57183965A
Cited
JPS57183964A
Cited
US4485133A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-03-31 | 1989-09-30 | 1990-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-31 | 1993-09-30 | 1994-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-31 | 1997-09-30 | 1998-04-01 | $7700.00 | Window Closed / Lapsed |