US3816108A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor granules for use in acoustic-electro converting devices
Assignee: NTT Inc
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Filing: 1971-12-22
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Granted: 1974-06-11
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Expires: 1991-12-22
Abstract
Abstract Semiconductor granules for use in acoustic-electro converting devices are made of alloys consisting of from 10 to 95 atomic weight percent of selenium and from 5 to 90 atomic weight percent of tellurium. The alloy may contain from 1 to 80 atomic weight percent of antimony or lead. The granules are packed in a chamber defined between a moving electrode supported by a diaphragm and a fixed electrode of an acoustic-electro converting device.
Inventors
- 👤 Y Mizushima
- 👤 T Takagi
- 👤 O Ochi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:22
CPC Classifications
H; H04; H04R; H04R21/00; H04R21/02; H04R21/021
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
21 words
The semiconductor granules according to claim 1, wherein said alloy further contains from 1 to 80 atomic weight percent of antimony.
Claim 2
Dependent Claim
21 words
The semiconductor granules according to claim 1, wherein said alloy further contains from 1 to 80 atomic weight percent of lead.
Claim 3
Dependent Claim
21 words
The semiconductor granules according to claim 1, wherein said alloy further contains from 0.001 to 0.1 percent by weight of halogen.
Claim 4
Dependent Claim
21 words
The semiconductor granules according to claim 2, wherein said alloy further contains from 0.001 to 0.1 percent by weight of halogen.
Claim 5
Dependent Claim
12 words
The semiconductor granules according to claim 4, wherein said halogen is chlorine.
Claim 6
Dependent Claim
64 words
An article of manufacture comprising acoustic-electric converting device semiconductor granules for use in acoustic-electric converting devices, the said granules consisting essentially of from 10 to 40 atomic weight percent of selenium, from 10 to 30 atomic wieght percent of tellurium and from 50 to 60 atomic weight percent of antimony, and characterized in having diameters of the order of from 0.1 to 0.4 mm.
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) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |