Patent US4487791A successfully refreshed from Google Patents.
US4487791A
Expired / Lapsed
US
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Oxygen absorbent packaging
Assignee: Mitsubishi Gas Chemical Co Inc
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Filing: 1982-05-11
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Granted: 1984-12-11
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Expires: 2002-05-11
Abstract
Abstract An oxygen absorbent package comprising a plastic microporous film or nonwoven fabric sheet 1 and a laminated sheet 2 comprising a plastic film 3 having a lower softening point than 1 and a plastic film 4 having a higher softening point than film 3, an oxygen absorbent 5 being put between 1 and 2 with film 3 forming the inner layer, the three layers being heat-sealed on the sides is disclosed. The oxygen absorbent is mainly used for storage of foodstuff, particularly liquid or semi-liquid foodstuff.
Inventors
- 👤 Toshio Komatsu
- 👤 Yukio Kondoh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:59
CPC Classifications
B; B65; B65D; B65D81/00; B65D81/24; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24273; Y10T428/24322; Y10T428/24331
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
70 words
An oxygen absorbent package comprising an outer layer of plastic film, a single intermediate layer of plastic film laminated to said outer layer, a porous plastic outer layer and an oxygen absorbent disposed between said intermediate layer and said porous outer layer, said intermediate layer having a lower softening point than said outer layers and being in contact with and heat sealed to said outer layers around their peripheral edges.
Claim 2
Dependent Claim
70 words
An oxygen absorbent package comprising an outer layer of plastic film, a single intermediate layer of plastic film laminated to said outer layer, a porous plastic outer layer and an oxygen absorbent disposed between said intermediate layer and said porous outer layer, said intermediate layer having a lower softening point than said outer layers and being in contact with and heat sealed to said outer layers around their peripheral edges.
Claim 3
Dependent Claim
50 words
A package according to claim 1 wherein said plastic film outer layer and plastic film intermediate layer provide a gas impermeable laminate and said porous plastic outer layer consists of a microporous film or non-woven fabric sheet having a permeability between 0.01 and 10,000 sec. per 100 ml of air.
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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) | 1987-12-11 | 1988-06-11 | 1988-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-11 | 1992-06-11 | 1992-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-11 | 1996-06-11 | 1996-12-11 | $7700.00 | Window Closed / Lapsed |