Patent US2769930A successfully refreshed from Google Patents.
US2769930A
Expired / Lapsed
US
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Piezo-electric devices
Assignee: —
•
Filing: —
•
Granted: 1956-11-06
•
Expires: 1973-11-06
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:35
CPC Classifications
H; H03; H03H; H03H3/00; H03H3/007; H03H3/02; Y; Y10; Y10T; Y10T29/00; Y10T29/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
THE METHOD OF PRODUCING A MOISTURE PROOF PIEZO ELECTRIC TRANSDUCER ASSEMBLY COMPRISING A PAIR OF PLATES OF PIEZO-ELECTRIC MATERIAL JOINED TOGETHER IN FACE TO FACE RELATION WHICH COMPRISES THE STEPS OF APPLYING AN ELECTRODE TO ONE FACE OF EACH PLATE, THEN APPLYING A COATING OF MOISTURE-PROOFING MATERIAL TO ALL SURFACES OF SAID ELECTRODED PLATES, AND THEN CEMENTING THE MOISTURE PROOFED ELECTRODED FACES OF SAID PLATES TOGETHER.
Claim 2
Independent Claim
66 words
THE METHOD OF PRODUCING A MOISTURE PROOF PIEZO ELECTRIC TRANSDUCER ASSEMBLY COMPRISING A PAIR OF PLATES OF PIEZO-ELECTRIC MATERIAL JOINED TOGETHER IN FACE TO FACE RELATION WHICH COMPRISES THE STEPS OF APPLYING AN ELECTRODE TO ONE FACE OF EACH PLATE, THEN APPLYING A COATING OF MOISTURE-PROOFING MATERIAL TO ALL SURFACES OF SAID ELECTRODED PLATES, AND THEN CEMENTING THE MOISTURE PROOFED ELECTRODED FACES OF SAID PLATES TOGETHER.
References Cited (Backward Citations)
US1766042A
Cited
US2266333A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-06 | 1960-05-07 | 1960-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-06 | 1964-05-07 | 1964-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-06 | 1968-05-07 | 1968-11-06 | $7700.00 | Window Closed / Lapsed |