Patent US3310761A successfully refreshed from Google Patents.
US3630759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Package for respiratory products
Assignee: Fort James Corp
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Filing: 1970-01-02
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Granted: 1971-12-28
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Expires: 1990-01-02
Abstract
Abstract Perishable plant foods are contained in a package comprising an inner pouch containing the plant food and an outer pouch enveloping the inner pouch and containing a gaseous atmosphere having an oxygen content less than about 15 percent by volume therebetween. The inner pouch is made of a material having a carbon dioxide to oxygen permeability ratio of at least 3:1, and the outer pouch is made of a material having both a carbon dioxide permeability and an oxygen permeability no greater than about one-fourth of the oxygen permeability of the inner pouch material.
Inventors
- 👤 George G Rumberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 01:24
CPC Classifications
B; B65; B65D; B65D81/00; B65D81/24; A; A23; A23B; A23B7/00; A23B7/14; A23B7/144; A23B7/148; B65D75/00; B65D75/38
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
23 words
A package according to claim 1 wherein the concentration of oxygen in said gaseous atmosphere is less than about 4 percent by volume.
Claim 2
Dependent Claim
13 words
A package according to claim 1 wherein said inner film is polyvinyl chloride.
Claim 3
Dependent Claim
12 words
A package according to claim 1 wherein said inner film is nylon.
Claim 4
Dependent Claim
13 words
A package according to claim 1 wherein said inner film is rubber hydrochloride.
Claim 5
Dependent Claim
13 words
A package according to claim 1 wherein said outer film is polyvinylidene chloride.
Claim 6
Dependent Claim
19 words
A package according to claim 1 wherein said outer film is polyethylene having a coating of polyvinylidene chloride thereon.
Claim 7
Dependent Claim
87 words
A perishable plant food package comprising an inner film, defining an inner pouch enclosing said food, of a plastic sheet material having a carbon dioxide to oxygen permeability ratio of at least 3:1 an outer filM which is polyvinyl alcohol enveloping said inner pouch and having both a carbon dioxide permeability and an oxygen permeability no greater than about one-fourth of the oxygen permeability of the inner film; and a gaseous atmosphere having an oxygen content less than about 15 percent by volume enclosed between said films.
Claim 8
Dependent Claim
19 words
A package according to claim 8 wherein said inner film is polyethylene and said outer film is polyvinyl alcohol.
Claim 9
Dependent Claim
22 words
A package according to claim 8 wherein the inner film has a carbon dioxide to oxygen permeability ratio of at least 4:1.
Claim 10
Independent Claim
102 words
A method of packaging perishable plant foods which includes the steps of: inserting said food into an inner pouch of a plastic sheet material having a carbon dioxide to oxygen permeability ratio of at least about 3:1; sealing said inner pouch; inserting said sealed pouch into an outer enclosure of a synthetic plastic material having both a carbon dioxide permeability and an oxygen permeability no greater than about one-fourth of the oxygen permeability of the inner pouch; surrounding said inner pouch with a gaseous atmosphere having an oxygen content less than about 15 percent by volume; and hermetically sealing said outer enclosure.
Claim 11
Dependent Claim
18 words
The method in accordance with claim 11 wherein said gaseous atmosphere contains less than about 4 percent oxygen.
Claim 12
Dependent Claim
18 words
The method in accordance with claim 11 wherein the inner pouch is flushed with nitrogen prior to sealing.
Claim 13
Dependent Claim
16 words
The method in accordance with claim 11 wherein the inner pouch is evacuated prior to sealing.
References Cited (Backward Citations)
US3248040A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |