Patent US4555426A successfully refreshed from Google Patents.
US4555426A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preformed, laminated plastic panels
Assignee: TECHNOCHEMIE - VERFAHRENSTECHNIK 6901 DOSSENHEIM GERMANY (REPECTIVELY) GmbH
•
Filing: 1983-10-19
•
Granted: 1985-11-26
•
Expires: 2003-10-19
Abstract
Abstract Novel preformed, laminated plastic panels as semi-finished products comprising a plurality of individual laminated thermoplastic layers or thermoplastic layers arranged in partly differing orientations reinforced with unidirectionally preoriented short fibers comprising 20 to 80% of the layer volume, said laminate capable of being molded and/or deep drawn by hot pressing and/or hot molding at 70° to 400° C. and at a pressure of approximately 40 bar.
Inventors
- 👤 Siegfried Roth
- 👤 Horst Stenzenberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:23
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/04; B29C70/06; B29C70/10; B29C70/12; B29C70/14; B29C70/28; B29C70/40; B29C70/42; B29C70/44; B29C43/00; B29C43/02; B29C43/10; B29C43/12; B29K; B29K2081/00; B29K2105/00; B29K2105/06; B29K2105/12; B29K2105/14; B29K2503/00; B29L; B29L2009/00; Y; Y10; Y10S; Y10S428/00; Y10S428/91; Y10T; Y10T428/00; Y10T428/24; Y10T428/24058; Y10T428/24124
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
39 words
A preformed, rigid, laminated plastic panel comprising a plurality of individual rigid, unfoamed, non-porous laminated thermoplastic layers or thermoplastic layers arranged in partly differing orientation reinforced with unidirectionally preoriented short fibers comprising 20 to 80% of the layer volume.
Claim 2
Dependent Claim
39 words
A preformed, rigid, laminated plastic panel comprising a plurality of individual rigid, unfoamed, non-porous laminated thermoplastic layers or thermoplastic layers arranged in partly differing orientation reinforced with unidirectionally preoriented short fibers comprising 20 to 80% of the layer volume.
Claim 3
Dependent Claim
29 words
The panel of claim 1 wherein the short fibers are selected from the group consisting of carbon fibers, glass fibers, ceramic fibers, metal fibers, polymeric fibers and mixtures thereof.
Claim 4
Dependent Claim
16 words
The panel of claim 1 wherein the layers have a fiber volume of 40 to 65%.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-11-25 | 1989-05-27 | 1989-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-25 | 1993-05-27 | 1993-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-25 | 1997-05-27 | 1997-11-26 | $7700.00 | Window Closed / Lapsed |