Patent US3362501A successfully refreshed from Google Patents.
US3362501A
Expired / Lapsed
US
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Acoustic transmission section
Assignee: Magnaflux Corp
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Filing: 1966-09-15
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Granted: 1968-01-09
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Expires: 1986-09-15
Abstract
No abstract record available.
Inventors
- 👤 James L Lenahan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:23
CPC Classifications
G; G10; G10K; G10K11/00; G10K11/02; G01; G01N; G01N29/00; G01N29/22; G01N29/28; Y; Y10; Y10S; Y10S181/00; Y10S181/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
IN ACOUSTIC APPARATUS, A MEMBER OF A FIRSTT SOLID MATERIAL HAVING A CERTAIN CHARACTERISTIC OF ACOUSTIC IMPEDANCE, AND IMPEDANCE MODIFYING MEANS INCLUDING AT LEAST ONE LAYER OF A SECOND MATERIAL HAVING A CHARACTERISTIC ACOUSTIC IMPEDANCE DIFFERENT FROM SAID CERTAIN CHARACTERISTIC IMPEDANCE, SAID LAYER BEING EMBEDDED IN SAID FIRST
Claim 2
Dependent Claim
48 words
IN ACOUSTIC APPARATUS, A MEMBER OF A FIRSTT SOLID MATERIAL HAVING A CERTAIN CHARACTERISTIC OF ACOUSTIC IMPEDANCE, AND IMPEDANCE MODIFYING MEANS INCLUDING AT LEAST ONE LAYER OF A SECOND MATERIAL HAVING A CHARACTERISTIC ACOUSTIC IMPEDANCE DIFFERENT FROM SAID CERTAIN CHARACTERISTIC IMPEDANCE, SAID LAYER BEING EMBEDDED IN SAID FIRST
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) | 1971-01-08 | 1971-07-10 | 1972-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-08 | 1975-07-10 | 1976-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-08 | 1979-07-10 | 1980-01-09 | $7700.00 | Window Closed / Lapsed |