Patent US3833704A successfully refreshed from Google Patents.
US3833704A
Expired / Lapsed
US
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Method of extracting a plural layered sheet
Assignee: Welex Inc
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Filing: 1972-06-19
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Granted: 1974-09-03
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Expires: 1992-06-19
Abstract
Abstract A thermoplastic sheet comprising a lamina bearing base in produced by feeding a heat-plastified laminated rod into a conventional sheet forming die. The laminated rod is formed using an adapter die which is interposed between a rod-forming die and the sheet forming die and which deposits a layer of heat-plastified material constituting the lamina on a segment of the peripheral surface of the cross-section of a heat-plastified rod of the base material, as the rod is extruded from the rod-forming die. The sheet forming die converts the heat-plastified laminated rod into a laminated sheet.
Inventors
- 👤 F Nissel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:13
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/30; B29C48/305; B29C48/307; B29C48/03; B29C48/06; B29C48/07; B29C48/08; B29C48/12; B29C48/16; B29C48/18; B29C48/21
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-02 | 1978-03-04 | 1978-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-02 | 1982-03-04 | 1982-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-02 | 1986-03-04 | 1986-09-03 | $7700.00 | Window Closed / Lapsed |