Patent US5410210A successfully refreshed from Google Patents.
US5410210A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piezoelectric device and process for production thereof
Assignee: Kureha Corp
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Filing: 1993-11-24
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Granted: 1995-04-25
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Expires: 2013-11-24
Abstract
Abstract A sheet-form piezoelectric device having improved mechanical strengths as represented by an electrode peel strength while retaining flexibility and piezoelectric performances of a polymer-type piezoelectric device, is obtained by embedding a perforated sheet electrode into at least one surface layer of a polymer piezoelectric film treated with a solvent in advance. The sheet-form piezoelectric device may be wound or curved about a certain central axis to provide a tubular or curved piezoelectric device having wave-transmitting and/or -receiving characteristics suitable for wave-transmitting and/or -receiving devices, such as a hydrophone and microphone.
Inventors
- 👤 Takashi Sato
- 👤 Kazuyuki Suzuki
- 👤 Nobuhiro Moriyama
- 👤 Kenichi Nakamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:45
CPC Classifications
H; H10; H10N; H10N30/00; H10N30/01; H10N30/09; H10N30/098; H10N30/30; H10N30/80; H10N30/87; H04; H04R; H04R17/00; Y; Y10; Y10S; Y10S310/00; Y10S310/80
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
86 words
A sheet-form piezoelectric device, comprising: a polymeric piezoelectric film or sheet, and a perforated sheet electrode embedded within at least one surface layer of the piezoelectric film or sheet; wherein (a) said polymeric piezoelectric film or sheet has a thickness of 50-2000 μm, and (b) said perforated sheet electrode is (i) a mesh electrode having a perforation of 20-350 μm and a wire diameter of 20-300 μm, or (ii) a bored plate electrode having a thickness of 10-800 μm and an areal opening ratio of 10-70%.
Claim 2
Dependent Claim
86 words
A sheet-form piezoelectric device, comprising: a polymeric piezoelectric film or sheet, and a perforated sheet electrode embedded within at least one surface layer of the piezoelectric film or sheet; wherein (a) said polymeric piezoelectric film or sheet has a thickness of 50-2000 μm, and (b) said perforated sheet electrode is (i) a mesh electrode having a perforation of 20-350 μm and a wire diameter of 20-300 μm, or (ii) a bored plate electrode having a thickness of 10-800 μm and an areal opening ratio of 10-70%.
Claim 3
Dependent Claim
95 words
The tubular piezoelectric device, comprising: a sheet-form piezoelectric device formed by embedding a perforated sheet electrode within a surface layer of a polymer piezoelectric film or sheet, and wound around a certain central axis into a tube, and wherein: (a) said polymeric piezoelectric film or sheet has a thickness of 50-2000 μm, and (b) said perforated sheet electrode is (i) a mesh electrode having a perforation of 20-350 μm and a wire diameter of 20-300 μm or (ii) a bored plate electrode having a thickness of 10-800 μm and an areal opening ratio of 10-70%.
Claim 4
Dependent Claim
95 words
The tubular piezoelectric device, comprising: a sheet-form piezoelectric device formed by embedding a perforated sheet electrode within a surface layer of a polymer piezoelectric film or sheet, and wound around a certain central axis into a tube, and wherein: (a) said polymeric piezoelectric film or sheet has a thickness of 50-2000 μm, and (b) said perforated sheet electrode is (i) a mesh electrode having a perforation of 20-350 μm and a wire diameter of 20-300 μm or (ii) a bored plate electrode having a thickness of 10-800 μm and an areal opening ratio of 10-70%.
Claim 5
Dependent Claim
46 words
The tubular piezoelectric device according to claim 2, wherein the sheet-form piezoelectric device is provided with an insulating coating at least one surface thereof and is wound in plural turns around the central axis into a tube with plural superposed layers of the sheet-form piezoelectric device.
Claim 6
Dependent Claim
98 words
A curved piezoelectric device, comprising: a sheet-form piezoelectric device formed by embedding a perforated sheet electrode within a surface layer of a polymer piezoelectric film or sheet, and formed into a curved shape with respect to a certain central axis, and wherein: (a) said polymeric piezoelectric film or sheet has a thickness of 50-2000 μm, and (b) said perforated sheet electrode is (i) a mesh electrode having a perforation of 20-350 μm and a wire diameter of 20-300 μm or (ii) a bored plate electrode having a thickness of 10-800 μm and an areal opening ratio of 10-70%.
Claim 7
Dependent Claim
98 words
A curved piezoelectric device, comprising: a sheet-form piezoelectric device formed by embedding a perforated sheet electrode within a surface layer of a polymer piezoelectric film or sheet, and formed into a curved shape with respect to a certain central axis, and wherein: (a) said polymeric piezoelectric film or sheet has a thickness of 50-2000 μm, and (b) said perforated sheet electrode is (i) a mesh electrode having a perforation of 20-350 μm and a wire diameter of 20-300 μm or (ii) a bored plate electrode having a thickness of 10-800 μm and an areal opening ratio of 10-70%.
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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) | 1998-04-24 | 1998-10-24 | 1999-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-04-24 | 2002-10-24 | 2003-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-04-24 | 2006-10-24 | 2007-04-25 | $7700.00 | Window Closed / Lapsed |