Patent US4726443A successfully refreshed from Google Patents.
US4726443A
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Diaphragm
Assignee: Fujikura Ltd
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Filing: 1985-10-03
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Granted: 1988-02-23
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Expires: 2005-10-03
Abstract
Abstract A diaphragm using a metal material applied with anodic oxide films, in which said metal material contains one of lead compounds, inorganic metal compounds and phosphor compounds at least to a portion in the micropores of the anodic oxide film.
Inventors
- 👤 Masana Ugaji
- 👤 Shinichi Watanabe
- 👤 Hiroyuki Sogawa
- 👤 Nobuo Fuke
- 👤 Masatsugu Maejima
- 👤 Koichi Saruwatari
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:02
CPC Classifications
H; H04; H04R; H04R7/00; H04R7/02; H04R7/04; H04R7/06; H04R7/10; H04R2307/00; H04R2307/023; H04R2307/027; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249978
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
78 words
An acoustical diaphragm comprising a base metal applied with anodic oxide films having micropores, in which a compound chosen from the group consisting of lead compounds, inorganic metal compounds and phosphor compounds is impregnated in at least a portion of the micropores of the anodic oxide film, to obtain an increase in the sonic velocity of the diaphragm to more than 5500 m/sec and a decrease in the sharpness of resonance of the diaphragm to less than 80.
Claim 2
Dependent Claim
78 words
An acoustical diaphragm comprising a base metal applied with anodic oxide films having micropores, in which a compound chosen from the group consisting of lead compounds, inorganic metal compounds and phosphor compounds is impregnated in at least a portion of the micropores of the anodic oxide film, to obtain an increase in the sonic velocity of the diaphragm to more than 5500 m/sec and a decrease in the sharpness of resonance of the diaphragm to less than 80.
Claim 3
Dependent Claim
65 words
A acoustical diaphragm comprising a base metal applied with anodic oxide films having micropores, in which a lead compound is impregnated in at least a portion of the micropores of the anodic oxide film, to obtain an increase in the sonic velocity of the diaphragm to more than 5500 m/sec and a decrease in the sharpness of resonance of the diaphragm to less than 80.
Claim 4
Dependent Claim
65 words
A acoustical diaphragm comprising a base metal applied with anodic oxide films having micropores, in which a lead compound is impregnated in at least a portion of the micropores of the anodic oxide film, to obtain an increase in the sonic velocity of the diaphragm to more than 5500 m/sec and a decrease in the sharpness of resonance of the diaphragm to less than 80.
Claim 5
Dependent Claim
66 words
An acoustical diaphragm comprising a base metal applied with anodic oxide films having micropores, in which an organic metal compound is impregnated in at least a portion of the micropores of the anodic oxide films, to obtain an increase in the sonic velocity of the diaphragm to more than 5500 m/sec and a decrease in the sharpness of resonance of the diaphragm to less than 80.
Claim 6
Dependent Claim
66 words
An acoustical diaphragm comprising a base metal applied with anodic oxide films having micropores, in which an organic metal compound is impregnated in at least a portion of the micropores of the anodic oxide films, to obtain an increase in the sonic velocity of the diaphragm to more than 5500 m/sec and a decrease in the sharpness of resonance of the diaphragm to less than 80.
Claim 7
Dependent Claim
33 words
A diaphragm comprising a base metal applied with anodic oxide films having micropores, in which a phosphor compound is impregnated in at least a portion of the micropores of the anodic oxide film.
Claim 8
Dependent Claim
33 words
A diaphragm comprising a base metal applied with anodic oxide films having micropores, in which a phosphor compound is impregnated in at least a portion of the micropores of the anodic oxide film.
Claim 9
Dependent Claim
17 words
The diaphragm as defined in any one of claims to 4, wherein the metal material is aluminum.
Claim 10
Dependent Claim
14 words
The diaphragm as defined in claim 2, wherein the lead compound is lead sulfide.
Claim 11
Dependent Claim
21 words
The diaphragm as defined in claim 3, wherein the inorganic metal compound is selected from hydroxide, oxide and sulfide of metals.
Claim 12
Dependent Claim
16 words
The diaphragm as defined in claim 7, wherein the hydroxide of the metals is iron hydroxide.
Claim 13
Dependent Claim
16 words
The diaphragm as defined in claim 7, wherein the hydroxide of the metals is lead hydroxide.
Claim 14
Dependent Claim
14 words
The diaphragm as defined in claim 4, wherein the phosphor compound is phosphor oxide.
References Cited (Backward Citations)
JPS5513198A
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JPS5514155A
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JPS5515156A
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JPS5515157A
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JPS5535476A
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US4230539A
Cited
US4368107A
Cited
JPS5797295A
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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) | 1991-02-22 | 1991-08-24 | 1992-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-02-22 | 1995-08-24 | 1996-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-02-22 | 1999-08-24 | 2000-02-23 | $7700.00 | Window Closed / Lapsed |