US3687764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing a multilayer reinforced plastic sheet material
Assignee: Ethyl Corp
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Filing: 1970-09-23
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Granted: 1972-08-29
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Expires: 1990-09-23
Abstract
Abstract A FLEXIBLE, REINFORCED LAMINATED PLASTIC SHEET MATERIAL MADE FROM TWO SHEETS OF A MULTILAYER THERMOPLASTIC MATERIAL HAVING A WEB OF REINFORCING STRANDS RECEIVED THEREBETWEEN. THE TWO SHEETS OF MATERIAL AREBONDED TO EACH OTHER IN THE INTERSTICES PROVIDED IN THE WEB. THE CONTACTING SIDE OF EACH SHEET OF MATERIAL IN COMPOSED OF A LAYER OF A THERMOPLASTIC HAVING A LOWER MELTING POINT OR SEALING TEMPERATURE THAN THE OUTER LAYER OF THE MULTILAYER THERMOPLASTIC MATERIAL. THE INNER LAYERS ARE BONDED TO EACH OTHER WITHOUT THE USE OF ANY ADHESIVE BY PASSING THE TWO SHEETS AND THE ENCLOSED WEB BETWEEN ROTATING HEATED LAMINATING ROLLS.
Inventors
- 👤 John E Rogosch
- 👤 Floyd B Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:31
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/12; B32B27/06; B32B27/08; B29; B29C; B29C70/00; B29C70/68; B29C70/685; B29C70/687; B32B2307/00; B32B2307/70; B32B2307/712; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24058; Y10T428/24074; Y10T428/24942
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) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |