Patent US6183520B1 successfully refreshed from Google Patents.
US4026460A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve type shipping bag
Assignee: Dow Chemical Co
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Filing: 1976-05-03
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Granted: 1977-05-31
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Expires: 1996-05-03
Abstract
Abstract A force flow valve type shipping bag including a vapor barrier ply, incorporating a valve-like sealable vent communicating between the exterior of the bag and the space between the vapor barrier ply and the inner wall plies of the bag.
Inventors
- 👤 James A. May
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:17
CPC Classifications
B; B65; B65D; B65D31/00; B65D31/14; Y; Y10; Y10S; Y10S383/00; Y10S383/904
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
69 words
A valve fill type shipping bag having top, bottom, ends and sides comprising multi-ply walls including a vapor barrier ply sandwiched between gas permeable wall plies, closable filling valve means, and sealable gas venting means extending between said vapor barrier ply and those gas permeable plies which are between the interior of the bag and said vapor barrier ply, said venting means communicating with the exterior of said bag.
Claim 2
Dependent Claim
69 words
A valve fill type shipping bag having top, bottom, ends and sides comprising multi-ply walls including a vapor barrier ply sandwiched between gas permeable wall plies, closable filling valve means, and sealable gas venting means extending between said vapor barrier ply and those gas permeable plies which are between the interior of the bag and said vapor barrier ply, said venting means communicating with the exterior of said bag.
Claim 3
Dependent Claim
38 words
A shipping bag in accordance with claim 1, wherein said gas venting means is a generally tubular member having a vapor barrier disposed at least along the part of it which communicates with the exterior of said bag.
Claim 4
Dependent Claim
16 words
A shipping bag in accordance with claim 2, wherein said tubular member is made of paper.
Claim 5
Dependent Claim
19 words
A shipping bag in accordance with claim 2, wherein said tubular member is made of heat sealable plastic material.
Claim 6
Dependent Claim
30 words
A shipping bag in accordance with claim 1, wherein said venting means is disposed at the bottom part of said bag and extends outwardly from a side of said bag.
Claim 7
Dependent Claim
29 words
A shipping bag in accordance with claim 1, wherein said venting means is disposed at the bottom of said bag and extends outwardly from an end of said bag.
Claim 8
Dependent Claim
16 words
A shipping bag in accordance with claim 1, wherein said venting means includes a sealing part.
Claim 9
Dependent Claim
17 words
A shipping bag in accordance with claim 1, wherein said gas permeable plies are made of paper.
Claim 10
Dependent Claim
65 words
A shipping bag in accordance with claim 1, wherein said venting means is an integral part of said bag plies comprising an unsealed section between said vapor barrier ply and the next adjacent inner ply in the bottom of said bag which defines a passageway communicating between the exterior of the bag and the space between the vapor barrier and the next adjacent inner ply.
Claim 11
Dependent Claim
18 words
A shipping bag in accordance with claim 9, wherein a slip sheet is disposed between said unsealed plies.
References Cited (Backward Citations)
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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) | 1980-05-30 | 1980-11-29 | 1981-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-30 | 1984-11-29 | 1985-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-30 | 1988-11-29 | 1989-05-31 | $7700.00 | Window Closed / Lapsed |