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Patent US2736823A successfully refreshed from Google Patents.
US2736823A
Expired / Lapsed
US
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Acoustic transducer and damping assembly
Assignee: Unisys Corp
•
Filing: 1952-03-31
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Granted: 1956-02-28
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Expires: 1972-03-31
Abstract
No abstract record available.
Inventors
- 👤 Sheppard Charles Bradford
- 👤 Norman H Goldich
- 👤 Max H Kraus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:11
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/02; H03H9/125
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
IN AN APPARATUS FOR THE PRODUCTION AND CONTROL OF LONGITUDINAL WAVES IN A WAVE TRANSMITTING MEDIUM, A TRANSDUCER ELEMENT INCLUDING A PIEZO CRYSTAL, AND MULTIFACETED MULTIFARIOUSLY REVERBERATING MATERIAL SECURED TO SAID CRYSTAL, SAID MATERIAL COMPRISING METAL WOOL EMBEDDED IN SOLDER, AND SAID SOLDER COMPRISING A MIXTURE OF TIN AND LEAD.
Claim 2
Dependent Claim
50 words
IN AN APPARATUS FOR THE PRODUCTION AND CONTROL OF LONGITUDINAL WAVES IN A WAVE TRANSMITTING MEDIUM, A TRANSDUCER ELEMENT INCLUDING A PIEZO CRYSTAL, AND MULTIFACETED MULTIFARIOUSLY REVERBERATING MATERIAL SECURED TO SAID CRYSTAL, SAID MATERIAL COMPRISING METAL WOOL EMBEDDED IN SOLDER, AND SAID SOLDER COMPRISING A MIXTURE OF TIN AND LEAD.
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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) | 1959-02-27 | 1959-08-29 | 1960-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-27 | 1963-08-29 | 1964-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-27 | 1967-08-29 | 1968-02-28 | $7700.00 | Window Closed / Lapsed |