US3733381A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous process for making thermoformed articles of manufacture
Assignee: Standard Oil Co
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Filing: 1970-12-31
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Granted: 1973-05-15
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Expires: 1990-12-31
Abstract
Abstract POLYMERIC MATERIAL, WITH GAS INJECTION, IS CONTINUOUSLY EXTRUDED TO FORM A CONTINUOUS WEB OF FOAM. THE WEB IS THEN DIRECTLY LAMINATED AND THE ARTICLE OF MANUFACTURE IS DIRECTLY THERMOFORMED FROM THE LAMINATED WEB. OPTIONALLY, THE WEB SURFACE CAN BE PRINTED UPON BEFORE LAMINATION. THE PROVIDES AN ARTICLE HAVING A CELLUAR-STRUCTURE POLYMERIC SUBSTRATE HAVING AN IMPRINTED SURFACE PROTECTED BY A LAMINAR-LIKE COATING.
Inventors
- 👤 E Willette
- 👤 C Mazur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:03
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/065; B29; B29C; B29C51/00; B29C51/14; B29C67/00; B29C67/20; B32B1/00; B32B37/00; B32B37/14; B32B37/16; B32B37/20; B32B37/203; B32B38/00; B32B38/14; B32B38/145; B32B2309/00; B32B2309/02; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24628; Y10T428/24736
Claims Analysis
Total Claims: 0
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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) | 1976-05-14 | 1976-11-13 | 1977-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-14 | 1980-11-13 | 1981-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-14 | 1984-11-13 | 1985-05-15 | $7700.00 | Window Closed / Lapsed |