US3706410A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air permeable container
Assignee: Fibreboard Corp
•
Filing: 1970-11-16
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Granted: 1972-12-19
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Expires: 1990-11-16
Abstract
Abstract Tightly sealed containers are formed from blanks made of a substrate permeable to gas with a coating of a material substantially impermeable to gas applied to at least one surface of the blank. Selected areas of the coated surface of the blank are treated with a perforating material to form perforations through the coating but not the substrate in these areas, thereby permitting penetration of gas into and out of the container. By control of the size of the area perforated and the number and size of the perforations, the rate at which gas may enter and leave the container may be controlled.
Inventors
- 👤 David R Baker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:08
CPC Classifications
B; B65; B65D; B65D5/00; B65D5/42; B65D5/62; B65D65/00; B65D65/38
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
12 words
The invention of claim 1 wherein said heat sealable material is polyethylene.
Claim 2
Dependent Claim
30 words
The invention of claim 1 wherein both surfaces of said substrate are coated with a coating substantially impermeable to gas and perforations in said selected area extend through both coatings.
Claim 3
Dependent Claim
52 words
The invention of claim 1 in which the size of the selected areas and the number and size of the perforations are determined so as to providE a predetermined rate of gas transmission into and out of the container at a given pressure differential between the interior and exterior of the container.
References Cited (Backward Citations)
US1871418A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-19 | 1976-06-19 | 1976-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-19 | 1980-06-19 | 1980-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-19 | 1984-06-19 | 1984-12-19 | $7700.00 | Window Closed / Lapsed |