US4388422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fiber-reinforced composite materials
Assignee: AKZO PLASTICS BV A DUTCH CORP
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Filing: 1979-04-16
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Granted: 1983-06-14
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Expires: 1999-04-16
Abstract
Abstract A composite plastic material having improved shielding against electromagnetic interference is provided by injection molding a molding compound comprising elongated granules obtained by incorporating into a thermoplastic resin matrix metallized glass fibers together with carbon fibers.
Inventors
- 👤 Steven R. Gerteisen
- 👤 David R. Wetzel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:09
CPC Classifications
H; H05; H05K; H05K9/00; H05K9/0073; H05K9/0081; H05K9/009; C; C08; C08K; C08K7/00; C08K7/02; C08K7/04; H01; H01B; H01B3/00; H01B3/02; H01B3/08; H01B3/084
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A fiber reinforced thermoplastic resin composition of improved shielding effectiveness against electromagnetic interference comprising a polycarbonate resin having incorporated therein a commingled fiber constituent comprised of aluminized glass fibers and carbon fibers, wherein the fiber component and the resin component are present over a range of fiber to resin of from about 10% to about 45% and wherein the aluminized glass fiber and the carbon fiber are present over a range of aluminized glass fiber to carbon fiber of from about 20% to about 80%.
Claim 2
Dependent Claim
85 words
A fiber reinforced thermoplastic resin composition of improved shielding effectiveness against electromagnetic interference comprising a polycarbonate resin having incorporated therein a commingled fiber constituent comprised of aluminized glass fibers and carbon fibers, wherein the fiber component and the resin component are present over a range of fiber to resin of from about 10% to about 45% and wherein the aluminized glass fiber and the carbon fiber are present over a range of aluminized glass fiber to carbon fiber of from about 20% to about 80%.
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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) | 1986-06-13 | 1986-12-13 | 1987-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-13 | 1990-12-13 | 1991-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-13 | 1994-12-13 | 1995-06-14 | $7700.00 | Window Closed / Lapsed |