Patent US3793135A successfully refreshed from Google Patents.
US3793135A
Expired / Lapsed
US
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Formable barrier packaging material, process therefor and package thereof
Assignee: Guardian Packaging Corp
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Filing: 1971-10-06
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Granted: 1974-02-19
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Expires: 1991-10-06
Abstract
Abstract A strip of methyl methacrylate styrene polymer is laminated with a coating of a vinyl chloride-vinylidene chloride polymer. This lamination is a transparent semi-rigid, flexible packaging material which can be readily drawn in a mold to form a food containing package. The package can be filled with food product at relatively high temperature, and provides, when sealed, a food preserving package of long shelf life.
Inventors
- 👤 V Monia
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:55
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/04; C08J7/043; B; B29; B29C; B29C51/00; B29C51/14; B32; B32B; B32B25/00; B32B25/04; B32B25/08; B32B27/00; B32B27/30; B32B27/304; B32B7/00; B32B7/04; B32B7/12; B65; B65D; B65D1/00; B65D1/34; B65D1/36; C08J7/0427; B32B2439/00; B32B2439/70; C08J2333/00; C08J2333/04; C08J2333/06; C08J2333/10; C08J2333/12; C08J2427/00; C08J2427/02; C08J2427/04; C08J2427/08; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1379; Y10T428/1383; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/26; Y10T428/266; Y10T428/269; Y10T428/27; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/31917; Y10T428/3192; Y10T428/31924; Y10T428/31928; Y10T428/31931; Y10T428/31935
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
33 words
The article of claim 1 wherein said first lamina has a thickness of 0.012 to 0.040 inches, and said second lamina has a thickness of 2 to 25 pounds per ream of laminate.
Claim 2
Dependent Claim
30 words
The article of claim 1 wherein said first lamina is on the outside exposed surface of and said second lamina is on the inside exposed surface of the cup-shaped article.
Claim 3
Dependent Claim
100 words
A flexible semi-rigid laminated packaging material comprising: a first lamina of material of methyl methacrylate styrene polymer having a thickness of 0.006 inches to 0.060 inches; a secoNd lamina of vinyl chloride-vinylidene chloride polymer; and a third lamina of adhesive bonding said first and second laminae together, said adhesive being obtained by depositing onto said first laminae a mixture of about 68 percent by weight of acryloid resins, 10 percent glycolate and 22 percent of a polymer consisting essentially of vinyl chloride and vinyl acetate suspended at the time of the deposition in a liquid vehicle comprising methyl ethyl ketone.
Claim 4
Dependent Claim
34 words
The packaging material of claim 4 wherein said first lamina has a thickness of 0.012 to 0.040 inches and said second lamina has a thickness of 2 to 25 pounds per ream of laminate.
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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) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |