US3671371A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for attaching a thermoplastic foil to a supporting structure
Assignee: Ironflex AG
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Filing: 1970-02-19
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Granted: 1972-06-20
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Expires: 1990-02-19
Abstract
Abstract A device for attaching a thermoplastic foil at a supporting structure wherein the foil is heat sealed or welded to a holding plate formed by a metallic core and a thermoplastic cover layer. The holding plate is rigidly connected to the supporting structure and subsequently the foil is placed over the holding plate. Welding heat is generated by creating a high frequency field between the metallic core of the holding plate and an electrode placed on the side of the foil facing away from the holding plate. The metallic core of the holding plate forms a counter electrode.
Inventors
- 👤 Emanuel Wolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:35
CPC Classifications
E; E21; E21D; E21D11/00; E21D11/38; E21D11/383; B; B29; B29C; B29C63/00; B29C63/02; B29C63/48; B29C65/00; B29C65/02; B29C65/04; B29C66/00; B29C66/01; B29C66/02; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/20; B29C66/21; B29C66/40; B29C66/41; B29C66/45; B29C66/80; B29C66/81; B29C66/814; B29C66/8141; B29C66/81431; B29C66/83; B29C66/832; B29C66/8322; B44; B44C; B44C7/00; B44C7/02; B44C7/022; E04; E04D; E04D5/00; E04D5/14; E04D5/141; E04D5/142; E04D5/143; E04D5/144; E04D5/145; E04D5/147; E04D5/149; E04F; E04F13/00; E04F13/002; B29C2063/488; B29C66/47; B29C66/474; B29C66/70; B29C66/71; B29C66/81411; B29C66/81421; B29C66/81423; Y; Y10; Y10T; Y10T428/00; Y10T428/23; Y10T428/239; Y10T428/24; Y10T428/24008
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) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |