US4593006A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition for multilayer printed wiring board
Assignee: AGC Inc
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Filing: 1985-04-11
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Granted: 1986-06-03
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Expires: 2005-04-11
Abstract
Abstract A composition for a multilayer printed wiring board, consisting essentially of from 25 to 65% by weight of glass powder, from 0 to 60% by weight of alumina powder and from 5 to 60% by weight of forsterite powder, said glass powder consisting essentially of from 25 to 70% by weight of SiO2, from 4 to 15% by weight of Al2O3, from 25 to 45% by weight of B2O3 and from 0.5 to 30% by weight of BaO.
Inventors
- 👤 Mitsuo Takabatake
- 👤 Jiro Chiba
- 👤 Yoshinori Kokubu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:32
CPC Classifications
H; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0306; C; C03; C03C; C03C3/00; C03C3/04; C03C3/062; C03C3/064; C03C3/076; C03C3/089; C03C3/091
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
87 words
A composition for a multilayer printed wiring board, consisting essentially of from 25 to 65% by weight of glass powder, from 0 to 60% by weight of alumina powder and from 5 to 60% by weight of forsterite powder, said glass powder consisting essentially of from 25 to 70% by weight of SiO 2 , from 4 to 15% by weight of Al 2 O 3 , from 25 to 45% by weight of B 2 O 3 and from 0.5 to 30% by weight of BaO.
Claim 2
Dependent Claim
87 words
A composition for a multilayer printed wiring board, consisting essentially of from 25 to 65% by weight of glass powder, from 0 to 60% by weight of alumina powder and from 5 to 60% by weight of forsterite powder, said glass powder consisting essentially of from 25 to 70% by weight of SiO 2 , from 4 to 15% by weight of Al 2 O 3 , from 25 to 45% by weight of B 2 O 3 and from 0.5 to 30% by weight of BaO.
Claim 3
Dependent Claim
41 words
The composition according to claim 1, which consists essentially of from 25 to 65% by weight of the glass powder, from 10 to 55% by weight of the alumina powder, and from 5 to 50% by weight of the forsterite powder.
Claim 4
Dependent Claim
55 words
The composition according to claim 2, wherein said glass powder consists essentially of from 30 to 50% by weight of SiO 2 , from 5 to 13% by weight of Al 2 O 3 , from 30 to 40% by weight of B 2 O 3 and from 5 to 25% by weight of BaO.
Claim 5
Dependent Claim
41 words
The composition according to claim 1, which consists essentially of from 30 to 50% by weight of the glass powder, from 10 to 55% by weight of the alumina powder and from 5 to 55% by weight of the forsterite powder.
Claim 6
Dependent Claim
55 words
The composition according to claim 4, wherein said glass powder consists essentially of from 30 to 50% by weight of SiO 2 , from 5 to 13% by weight of Al 2 O 3 , from 30 to 40% by weight of B 2 O 3 and from 5 to 25% by weight of BaO.
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) | 1989-06-02 | 1989-12-02 | 1990-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-02 | 1993-12-02 | 1994-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-02 | 1997-12-02 | 1998-06-03 | $7700.00 | Window Closed / Lapsed |