US3752664A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metallic sound conductor or sound radiator
Assignee: Institut Straumann AG
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Filing: 1970-10-27
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Granted: 1973-08-14
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Expires: 1990-10-27
Abstract
Abstract A METALLIC SOUND TRANSMITTER OR SOUND RADIATOR COMBINES THE LOW ATTENUATION OF A POLYCRYSTALLINE MATERIAL WITH THE MALLEABILITY OF A METAL. THE ATTENUATION COEFFICIENT IS SEEN TO THE DETERMINED BY SOUND SCATTERING IN POLYCRYSTALLINE METALS AS A CONSEQUENCE OF ELASTIC ANISOTROPY WHICH IN TURN IS DETERMINED BY AN ELECTRONIC PROPERTY IN AN ALLOY, SO THAT A LOW COEFFICIENT CAN BE OBTAINED BY PROVIDING ALLOYS OF PREDETERMINED COMPOSITION WHICH HAVE THE APPROPRIATE ELECTRON PER ATOM RATIO.
Inventors
- 👤 S Steinemann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:38
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/30; C; C22; C22C; C22C14/00; C22C27/00; C22C27/02; C22C30/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |