US4439497A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrasonic sound absorber
Assignee: Shell USA Inc
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Filing: 1982-05-27
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Granted: 1984-03-27
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Expires: 2002-05-27
Abstract
Abstract An ultrasonic sound absorbing material capable of operating at high temperatures and pressures, said material comprises a dense, rigid, permeable material such as sintered metal filled with a viscous fluid.
Inventors
- 👤 Rocco DiFoggio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:36
CPC Classifications
G; G10; G10K; G10K11/00; G10K11/002; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12063; Y10T428/12069; Y10T428/12076; Y10T428/12083
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
80 words
A compact ultrasonic sound adsorbing material for use with the transducer of an acoustical logging system comprising: a sound adsorber, said adsorber being formed of sintered porous metal powder shaped to surround a portion of the transducer to adsorb acoustic waves arriving from predetermined directions, the surface of said adsorber facing said predetermined direction being retained in the as molded condition and free of any covering; and a viscous liquid, said liquid filling the pore space of the sound adsorber.
Claim 2
Dependent Claim
80 words
A compact ultrasonic sound adsorbing material for use with the transducer of an acoustical logging system comprising: a sound adsorber, said adsorber being formed of sintered porous metal powder shaped to surround a portion of the transducer to adsorb acoustic waves arriving from predetermined directions, the surface of said adsorber facing said predetermined direction being retained in the as molded condition and free of any covering; and a viscous liquid, said liquid filling the pore space of the sound adsorber.
Claim 3
Dependent Claim
12 words
The sound absorbing material of claim 1 wherein the metal is bronze.
Claim 4
Dependent Claim
14 words
The sound absorbing material of claim 1 wherein the metal is a stainless steel.
Claim 5
Dependent Claim
15 words
The sound absorbing material of claim 1 wherein the viscous liquid is a silicone oil.
Claim 6
Dependent Claim
15 words
The sound absorbing material of claim 4 wherein said silicone oil is non-soluble in hydrocarbons.
References Cited (Backward Citations)
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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) | 1987-03-27 | 1987-09-26 | 1988-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-27 | 1991-09-26 | 1992-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-27 | 1995-09-26 | 1996-03-27 | $7700.00 | Window Closed / Lapsed |