Patent DE384260C successfully refreshed from Google Patents.
US4485133A
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: 1984-11-27
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Expires: 2002-05-11
Abstract
Abstract An oxygen absorbent package comprising a rectangular nonwoven fabric sheet, a rectangular perforated film or nonwoven fabric sheet having a lower softening point than sheet, a rectangular microporous film or nonwoven fabric sheet having a higher softening point than film or sheet, and an oxygen absorbent, the three layers being heat sealed on the four sides is disclosed. The oxygen absorbent package is mainly used for storage of foodstuff, particularly liquid or semiliquid foodstuff.
Inventors
- 👤 Sadao Ohtsuka
- 👤 Toshio Komatsu
- 👤 Yukio Kondoh
- 👤 Hideyuki Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:41
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/12; B32B27/30; B32B27/306; B32B3/00; B32B3/02; B32B3/04; B32B3/26; B32B3/266; B32B5/00; B32B5/02; B32B5/022; B32B7/00; B32B7/02; B32B7/027; B65; B65D; B65D81/00; B65D81/24; B65D81/26; B65D81/266; B65D81/268; B32B2305/00; B32B2305/02; B32B2305/026; B32B2307/00; B32B2307/30; B32B2307/31; B32B2307/70; B32B2307/724; B32B2307/726; B32B2307/7265; B32B2439/00; B32B2439/70; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24273; Y10T428/24322
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
An oxygen absorbent package comprising first and second porous plastic outer layers, a single porous intermediate plastic layer and an oxygen absorbent disposed between one of said outer layers and said intermediate layer, said intermediate layer being gas permeable and having a lower softening point than the first and second outer layers and being in contact with and simultaneously heat sealed to said outer layers only around their peripheral edges, and said porous outer layers being gas permeable and water impermeable and consisting of a microporous film or nonwoven fabric sheet having a permeability between 0.01 and 10,000 sec. per 100 ml of air.
Claim 2
Dependent Claim
104 words
An oxygen absorbent package comprising first and second porous plastic outer layers, a single porous intermediate plastic layer and an oxygen absorbent disposed between one of said outer layers and said intermediate layer, said intermediate layer being gas permeable and having a lower softening point than the first and second outer layers and being in contact with and simultaneously heat sealed to said outer layers only around their peripheral edges, and said porous outer layers being gas permeable and water impermeable and consisting of a microporous film or nonwoven 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) | 1987-11-27 | 1988-05-28 | 1988-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-27 | 1992-05-28 | 1992-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-27 | 1996-05-28 | 1996-11-27 | $7700.00 | Window Closed / Lapsed |