Patent US4207901A successfully refreshed from Google Patents.
US4207901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrasound reflector
Assignee: New York Institute of Technology
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Filing: 1978-02-06
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Granted: 1980-06-17
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Expires: 1998-02-06
Abstract
Abstract A reflector is disclosed, suitable for use in an apparatus for sending and/or receiving ultrasonic energy through a propagating fluid. A thin layer of ultrasonically transmissive material is disposed on a supportive substrate having an optically rough surface. A single gaseous layer is trapped between the ultrasonically transmissive layer and the substrate, the gaseous layer being contained in the asperities of the substrate layer. The substrate is preferably a metal having a roughness in the range of 1 to 10 microns.
Inventors
- 👤 Anant K. Nigam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:53
CPC Classifications
G; G10; G10K; G10K11/00; G10K11/18; G10K11/26; G10K11/34; G10K11/341; G10K11/346; A; A61; A61B; A61B8/00; A61B8/08; G01; G01H; G01H3/00; G01H3/10; G01H3/12; G01H3/125; G10K11/30
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
78 words
For use in conjunction with an apparatus wherein a focused beam of ultrasonic energy is propagated through a fluid, a reflector suitable for disposing in said fluid to reflect said focused beam, comprising: a supportive substrate having an optically rough surface; a thin layer of ultrasonically transmissive material disposed on said substrate; and a single gaseous layer trapped between said ultrasonically transmissive layer and said substrate, said gaseous layer being contained in the asperities of said substrate surface.
Claim 2
Dependent Claim
78 words
For use in conjunction with an apparatus wherein a focused beam of ultrasonic energy is propagated through a fluid, a reflector suitable for disposing in said fluid to reflect said focused beam, comprising: a supportive substrate having an optically rough surface; a thin layer of ultrasonically transmissive material disposed on said substrate; and a single gaseous layer trapped between said ultrasonically transmissive layer and said substrate, said gaseous layer being contained in the asperities of said substrate surface.
Claim 3
Dependent Claim
12 words
Apparatus as defined by claim 1 wherein said substrate is a metal.
Claim 4
Dependent Claim
20 words
Apparatus as defined by claim 2 wherein said metal has a roughness of the order of one to ten microns.
Claim 5
Dependent Claim
22 words
Apparatus as defined by claim 3 wherein said layer of ultrasonically transmissive material has a thickness of about one to two mils.
Claim 6
Dependent Claim
15 words
Apparatus as defined by claim 4 wherein said ultrasonically transmissive material is a plastic foil.
Claim 7
Dependent Claim
15 words
Apparatus as defined in claim 3 wherein said ultrasonically transmissive material is a plastic foil.
Claim 8
Dependent Claim
22 words
Apparatus as defined by claim 2 wherein said layer of ultrasonically transmissive material has a thickness of about one to two mils.
Claim 9
Dependent Claim
20 words
Apparatus as defined by claim 1 wherein said metal has a roughness of the order of one to ten microns.
Claim 10
Dependent Claim
22 words
Apparatus as defined by claim 1 wherein said layer of ultrasonically transmissive material has a thickness of about one to two mils.
Claim 11
Dependent Claim
22 words
Apparatus as defined in claim 8 wherein said layer of ultrasonically transmissive material has a thickness of about one to two mils.
References Cited (Backward Citations)
FR1100914A
Cited
US2884084A
Cited
US3159023A
Cited
US3251219A
Cited
US3283294A
Cited
US3598199A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-06-17 | 1983-12-17 | 1984-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-06-17 | 1987-12-17 | 1988-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-06-17 | 1991-12-17 | 1992-06-17 | $7700.00 | Window Closed / Lapsed |