US3655504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated metal plates
Assignee: BASF SE
•
Filing: 1969-05-19
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Granted: 1972-04-11
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Expires: 1989-05-19
Abstract
Abstract Laminated metal plates made of (1) an outer layer of a metal, (2) an intermediate layer of a polymer, (3) an inner layer of a metal, (4) an intermediate layer of a polymer and (5) an outer layer of a metal. It is a characteristic of the invention that the polymer of layers (2) and (4) is a special terpolymer.
Inventors
- 👤 Heinz Mueller-Tamm
- 👤 Alfred Hofmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:47
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/04; B32B15/08; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/24975; Y10T428/31504; Y10T428/31678; Y10T428/31692; Y10T428/31699
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
16 words
an intermediate layer of a thermoplastic polymer having a thickness of from 0.02 to 1.5 mm;
Claim 2
Dependent Claim
15 words
an inner layer of aluminum or steel having a thickness of 0.3 to 4 mm;
Claim 3
Dependent Claim
17 words
an intermediate layer of a thermoplastic polymer having a thickness of from 0.01 to 1.5 mm; and
Claim 4
Dependent Claim
64 words
an outer layer of copper, brass, stainless steel, silver or gold having a thickness from 0.005 to 0.5 mm, wherein the thermoplastic polymer of layer (2) and layer (4) is a terpolymer consisting of 60 to 90 percent by weight of ethylene units, 0.5 to 20 percent by weight of acrylic acid units, and 0.5 to 20 percent by weight of tertiary-butyl acrylate units.
References Cited (Backward Citations)
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US3475240A
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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) | 1975-04-11 | 1975-10-11 | 1976-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-11 | 1979-10-11 | 1980-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-11 | 1983-10-11 | 1984-04-11 | $7700.00 | Window Closed / Lapsed |