Patent US4743392A successfully refreshed from Google Patents.
US4743392A
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Piezoelectric composite material
Assignee: Niterra Co Ltd
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Filing: 1986-08-07
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Granted: 1988-05-10
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Expires: 2006-08-07
Abstract
Abstract A piezoelectric ceramic composite material useful for use in underwater transducers or hydrophones, including an elastic organic matrix, and piezoelectric ceramic powder dispersed in the matrix and having the following chemical formula: Pb1+xTiO3+x wherein x is a number greater than 0.
Inventors
- 👤 Hirofumi Ozeki
- 👤 Hideo Sobue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:57
CPC Classifications
H; H10; H10N; H10N30/00; H10N30/80; H10N30/85; H10N30/852
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
46 words
A piezoelectric composite material comprising: an elastic organic matrix and piezoelectric ceramic powder having the chemical formula: Pb.sub.1+x TiO.sub.3+x where x is a number between 0.0068 and 0.07, and wherein said piezoelectric composition is present in an amount of from about 40 to 80% by volume.
Claim 2
Dependent Claim
46 words
A piezoelectric composite material comprising: an elastic organic matrix and piezoelectric ceramic powder having the chemical formula: Pb.sub.1+x TiO.sub.3+x where x is a number between 0.0068 and 0.07, and wherein said piezoelectric composition is present in an amount of from about 40 to 80% by volume.
Claim 3
Dependent Claim
26 words
A piezoelectric composite material according to claim 1, wherein the content of said piezoelectric ceramic powder in said composite material is 40 to 80% by volume.
Claim 4
Dependent Claim
18 words
A piezoelectric underwater transducer comprising a piezoelectric element formed of the piezoelectric composite material according to claim 1.
Claim 5
Dependent Claim
58 words
A piezoelectric composite material comprising: a piezoelectric ceramic powder having the chemical formula: Pb.sub.1+x TiO.sub.3+x where x is a number between 0.0068 and 0.07, and wherein said piezoelectric composition is present in an amount of from about 40 to 80% by volume; and an organic matrix including synthetic rubber, said piezoelectric material being dispersed in said organic matrix.
Claim 6
Dependent Claim
58 words
A piezoelectric composite material comprising: a piezoelectric ceramic powder having the chemical formula: Pb.sub.1+x TiO.sub.3+x where x is a number between 0.0068 and 0.07, and wherein said piezoelectric composition is present in an amount of from about 40 to 80% by volume; and an organic matrix including synthetic rubber, said piezoelectric material being dispersed in said organic matrix.
Claim 7
Dependent Claim
14 words
The piezoelectric composite material of claim 6 wherein said synthetic rubber is polychloroprene rubber.
References Cited (Backward Citations)
US4595515A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-05-10 | 1991-11-09 | 1992-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-10 | 1995-11-09 | 1996-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-10 | 1999-11-09 | 2000-05-10 | $7700.00 | Window Closed / Lapsed |