US4923735A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Moulded printed circuit board
Assignee: DSM BV
•
Filing: 1988-12-30
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Granted: 1990-05-08
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Expires: 2008-12-30
Abstract
Abstract The invention relates to a thermoplastic moulded printed circuit board consisting substantially of polyamide 4.6. Preferably use is made of a multilayer structure, of which at least one layer contains reinforcing filler material.
Inventors
- 👤 Erik R. Peerlkamp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:53
CPC Classifications
H; H05; H05K; H05K1/00; H05K1/02; H05K1/03; B; B32; B32B; B32B9/00; H05K1/0313; H05K1/032; H05K1/0346; Y; Y10; Y10S; Y10S428/00; Y10S428/901; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24917; Y10T428/31504; Y10T428/31678; Y10T428/31681; Y10T428/31725
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
18 words
Moulded circuit board of a thermoplastic polymer composition, wherein the polymer is composed substantially of tetramethylene adipamide units.
Claim 2
Dependent Claim
18 words
Moulded circuit board of a thermoplastic polymer composition, wherein the polymer is composed substantially of tetramethylene adipamide units.
Claim 3
Dependent Claim
34 words
Moulded printed circuit board according to claim 1, wherein said printed circuit board comprises several layers of which at least one layer contains at least one reinforcing material chosen from fibrous and non-fibrous materials.
Claim 4
Dependent Claim
21 words
Moulded printed circuit board according to claim 2, wherein said reinforcing material contains at least one fibrous and one non-fibrous filler.
Claim 5
Dependent Claim
43 words
Molded printed circuit board according to claim 3, wherein said fibrous material is present in a minor amount with respect to the non-fibrous material resulting in a suppression of the effect of anisotropy on the dimensional stability of said molded printed circuit board.
Claim 6
Dependent Claim
28 words
Molded printed circuit board according to claim 2, wherein said printed circuit board comprises at least one layer containing a metallic or metallized filler with electromagnetic shielding properties.
Claim 7
Dependent Claim
26 words
An electrical casing consisting essentially of a molded printed circuit board of a thermoplastic polymer composition, wherein said polymer is composed substantially of tetramethylene adipamide units.
Claim 8
Dependent Claim
26 words
An electrical casing consisting essentially of a molded printed circuit board of a thermoplastic polymer composition, wherein said polymer is composed substantially of tetramethylene adipamide units.
References Cited (Backward Citations)
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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) | 1993-05-07 | 1993-11-06 | 1994-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-07 | 1997-11-06 | 1998-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-07 | 2001-11-06 | 2002-05-08 | $7700.00 | Window Closed / Lapsed |