US4559254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resin material in sheet form
Assignee: Junkosha Co Ltd
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Filing: 1982-05-04
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Granted: 1985-12-17
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Expires: 2002-05-04
Abstract
Abstract A sheet of porous resinous material, particularly polytetrafluoroethylene, having a multiplicity of holes formed therethrough. The holes are provided in a plurality of rows extending along the length of the sheet. The sheet has a smaller thickness in the area extending along each row of holes than in its remaining portions.
Inventors
- 👤 Hirosuke Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:55
CPC Classifications
C; C08; C08L; C08L27/00; C08L27/02; C08L27/12; C08L27/18; H; H01; H01B; H01B1/00; H01B1/20; H01B1/24; H01B3/00; H01B3/18; H01B3/30; H01B3/44; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24273; Y10T428/24298; Y10T428/24314; Y10T428/24479; Y10T428/2457; Y10T428/249921; Y10T428/249953; Y10T428/31504; Y10T428/3154; Y10T428/31544
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
26 words
A dielectric comprising a sheet of continuously porous polytetrafluoroethylene material having, in addition to the pores of the porous material, a multiplicity of holes formed therethrough.
Claim 2
Dependent Claim
26 words
A dielectric comprising a sheet of continuously porous polytetrafluoroethylene material having, in addition to the pores of the porous material, a multiplicity of holes formed therethrough.
Claim 3
Dependent Claim
22 words
The dielectric of claim 1 wherein said holes are provided in a plurality of rows extending along the length of said sheet.
Claim 4
Dependent Claim
26 words
The dielectric of claim 2 wherein said sheet has a smaller thickness in the region extending along each row of holes than in its remaining portions.
Claim 5
Dependent Claim
20 words
The dielectric of claim 1 wherein said holes are provided in a plurality of rows extending transversely across said sheet.
Claim 6
Dependent Claim
26 words
The dielectric of claim 4 wherein said sheet has a smaller thickness in the region extending along each row of holes than in its remaining portions.
Claim 7
Dependent Claim
8 words
The dielectric of claim 1 containing a filler.
Claim 8
Dependent Claim
12 words
The dielectric of claim 6 wherein said filler is a coloring agent.
Claim 9
Dependent Claim
16 words
The dielectric of claim 6 wherein said filler is TiO 2 .Al 2 O 3 .
Claim 10
Dependent Claim
12 words
The dielectric of claim 6 wherein said filler is electrically conductive carbon.
Claim 11
Dependent Claim
11 words
The dielectric of claim 6 wherein said filler is a catalyst.
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) | 1988-12-16 | 1989-06-17 | 1989-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-16 | 1993-06-17 | 1993-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-16 | 1997-06-17 | 1997-12-17 | $7700.00 | Window Closed / Lapsed |