US5135799A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminates with stable attachment areas
Assignee: BASF SE
•
Filing: 1991-02-15
•
Granted: 1992-08-04
•
Expires: 2011-02-15
Abstract
Abstract Laminates with stable attachment areas have a foam or honeycomb core layer A comprising a heat resistant plastic and cover layers B comprising fiber reinforced heat resistant plastic, the core layer having at least one foam insert C of a heat resistant thermoplastic material whose density is higher than the density of the core.
Inventors
- 👤 Bernd Gross
- 👤 Heinz Weber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:05
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/18; B32B27/00; B32B27/06; B32B27/08; B32B3/00; B32B3/10; B32B3/12; B32B5/22; B32B5/24; B32B2305/00; B32B2305/02; B32B2305/022; B32B2305/024; B32B2307/00; B32B2307/30; B32B2307/306; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24149; Y10T428/24157; Y10T428/24174; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/249921; Y10T428/249953; Y10T428/249981; Y10T428/249987; Y10T428/249988; Y10T428/249991; Y10T428/249992; Y10T428/31504; Y10T428/31721
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
73 words
A laminate having stable attachment areas, formed from (A) a foam layer of from 30 to 150 kg·m -3 in density composed of a thermoplastic polyether sulfone or polysulfone, (B) at least one cover layer composed of a fiber reinforced heat resistant thermoplastic or thermoset material, (C) at least one foam insert, in said foam layer, of from 200 to 1000 kg·m -3 in density composed of a thermoplastic polyether sulfone or polysulfone.
Claim 2
Dependent Claim
73 words
A laminate having stable attachment areas, formed from (A) a foam layer of from 30 to 150 kg·m -3 in density composed of a thermoplastic polyether sulfone or polysulfone, (B) at least one cover layer composed of a fiber reinforced heat resistant thermoplastic or thermoset material, (C) at least one foam insert, in said foam layer, of from 200 to 1000 kg·m -3 in density composed of a thermoplastic polyether sulfone or polysulfone.
Claim 3
Dependent Claim
45 words
The laminate as claimed in claim 1, wherein said foam layer is from 4 to 40 mm in thickness, said cover layer is from 0.1 to 1.5 mm in thickness, and said at least one foam insert is from 0.5 to 10 cm in diameter.
References Cited (Backward Citations)
US3484335A
Cited
GB1467766A
Cited
US4265688A
Cited
US4889763A
Cited
EP0313171A1
Cited
US4940629A
Cited
US4885206A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-08-04 | 1996-02-03 | 1996-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-08-04 | 2000-02-03 | 2000-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-08-04 | 2004-02-03 | 2004-08-04 | $7700.00 | Window Closed / Lapsed |