US5035942A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible materials for reflecting electromagnetic wave
Assignee: Petoca Ltd
•
Filing: 1989-02-23
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Granted: 1991-07-30
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Expires: 2009-02-23
Abstract
Abstract Flexible materials for reflecting electromagnetic waves can be provided by using adhesive type non-woven fabrics formed by self adhesion of the principal component of pitch based carbon fibers.
Inventors
- 👤 Yoshikazu Nagata
- 👤 Yoshiyuki Nishimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:48
CPC Classifications
H; H05; H05K; H05K9/00; H05K9/0073; H05K9/0081; H05K9/009; D; D04; D04H; D04H1/00; D04H1/40; D04H1/42; D04H1/4209; D04H1/4242; H01; H01Q; H01Q15/00; H01Q15/14; H01Q15/141; H01Q15/142; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249924; Y10T428/24994; Y10T428/249948; Y10T428/30; Y10T442/00; Y10T442/60; Y10T442/69
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
22 words
Flexible materials for reflecting electromagnetic waves comprising non-woven fabric formed by self adhesion of pitch based carbon fibers as the principal component.
Claim 2
Dependent Claim
22 words
Flexible materials for reflecting electromagnetic waves comprising non-woven fabric formed by self adhesion of pitch based carbon fibers as the principal component.
Claim 3
Dependent Claim
42 words
Flexible materials for reflecting electromagnetic waves according to claim 1, wherein said carbon fibers are mesophase pitch based carbon fibers and the shielding capability of said flexible materials is greater than 50 dB in the region of 100 MHz to 1000 MHz.
References Cited (Backward Citations)
JPS50101405A
Cited
JPS5247014A
Cited
US4470960A
Cited
US4590055A
Cited
GB2131781A
Cited
EP0168639A2
Cited
JPS6290320A
Cited
US4861653A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-07-29 | 1995-01-28 | 1995-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-29 | 1999-01-28 | 1999-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-29 | 2003-01-28 | 2003-07-30 | $7700.00 | Window Closed / Lapsed |