Patent US2589403A successfully refreshed from Google Patents.
US2589403A
Expired / Lapsed
US
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Transducer construction and method
Assignee: United States Department of the Navy
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Filing: 1943-12-14
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Granted: 1952-03-18
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Expires: 1963-12-14
Abstract
No abstract record available.
Inventors
- 👤 Franz N D Kurie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:10
CPC Classifications
H; H04; H04R; H04R17/00; H04R17/04; Y; Y10; Y10S; Y10S228/00; Y10S228/903; Y10T; Y10T29/00; Y10T29/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
30 words
A CRYSTAL-TYPE TRANSDUCER COMPRISING A BACKING PLATE, A LAYER OF VITREOUS ENAMEL BONDED TO ONE FACE OF SAID PLATE, AND A PIEZO-ELECTRIC CRYSTAL BONDED TO SAID LAYER OF VITREOUS ENAMEL.
Claim 2
Dependent Claim
30 words
A CRYSTAL-TYPE TRANSDUCER COMPRISING A BACKING PLATE, A LAYER OF VITREOUS ENAMEL BONDED TO ONE FACE OF SAID PLATE, AND A PIEZO-ELECTRIC CRYSTAL BONDED TO SAID LAYER OF VITREOUS ENAMEL.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-18 | 1955-09-17 | 1956-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-18 | 1959-09-17 | 1960-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-18 | 1963-09-17 | 1964-03-18 | $7700.00 | Window Closed / Lapsed |