US3661697A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-ply packaging material of polyethylene, amylose and paper
Assignee: Primary Products Ingredients Americas LLC
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Filing: 1969-01-02
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Granted: 1972-05-09
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Expires: 1989-01-02
Abstract
Abstract A water-resistant, grease-resistant, oxygen-resistant multi-ply structure comprising, bonded together, smooth continuous layers of polyolefine and amylose, and paper bonded to either the polyolefine or amylose layer.
Inventors
- 👤 Ellsworth E Kimmel
- 👤 Austin H Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:03
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/04; C08J7/048; B; B32; B32B; B32B27/00; B32B27/06; B32B27/10; B32B27/32; C08J7/0427; C08J7/046; D; D21; D21H; D21H19/00; D21H19/80; D21H19/82; D21H19/824; B32B2255/00; B32B2255/12; B32B2307/00; B32B2307/70; B32B2307/726; B32B2307/7265; C08J2323/00; C08J2323/02; C08J2403/00; Y; Y10; Y10T; Y10T428/00; Y10T428/27; Y10T428/273; Y10T428/277; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31899; Y10T428/31902; Y10T428/31938; Y10T428/31971; Y10T428/31975
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
17 words
The article of claim 7, wherein said amylosic layer is bonded directly to said polyethylene subbing layer.
Claim 2
Dependent Claim
86 words
A water-resistant, grease-resistant, oxygen-resistant multi-ply structure, which comprises bonded together a paper base, a smooth, uniform, continuous layer of polyethylene and a smooth, uniform, continuous amylosic layer, wherein at least one surface of said paper base is bonded to an amylosic subbing layer and a continuous, uniform, smooth layer of polyethylene is bonded to said amylosic subbing layer, said amylosic subbing layer weighing at least 0.75 pounds per 1,000 square feet of paper and comprising an amylaceous material having at least 75 percent by weight amylose.
Claim 3
Dependent Claim
17 words
The article of claim 3, wherein said polyethylene layer is bonded directly to Said amylosic subbing layer.
Claim 4
Dependent Claim
21 words
The article of claim 3, wherein said amylosic layer comprises a water-insoluble layer of retrograded, underivatized amylose plasticized with polyvinyl alcohol.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |