US3370188A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piezoelectric crystal support structure
Assignee: AT&T Inc
•
Filing: 1966-01-21
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Granted: 1968-02-20
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Expires: 1986-01-21
Abstract
No abstract record available.
Inventors
- 👤 Paul R Blomster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:40
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/02; H03H9/05; H03H9/0504; H03H9/0533
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
A PIEZOELECTRIC CRYSTAL UNIT COMPRISING A FLAT PIEZOELECTRIC CRYSTAL PLATE, AT LEAST TWO WIRES ATTACHED TO THE MAJOR FACES OF THE CRYSTAL PLATE, A SUPPORT STRUCTURE FOR SUSPENDING THE CRYSTAL BETWEEN SAID WIRES, SAID SUPPORT STRUCTURE COMPRISING ONE RELATIVELY RIGID MEMBER AND ONE RELATIVELY FLEXIBLE MEMBER, SAID RELATIVELY RIGID MEMBER HAVING A STIFFNESS COEFFICIENT OF AT LEAST 80 POUNDS PER INCH OF DEFLECTION AND SAID RELATIVELY FLEXIBLE MEMBER HAVING A STIFFNESS COEFFICIENT IN THE RANGE 0.5 TO 10 POUNDS PER INCH OF DEFLECTION AND A BASE MEMBER FOR MOUNTING EACH OF SAID MEMBERS IN SPACED PARALLEL RELATIONSHIP.
Claim 2
Dependent Claim
97 words
A PIEZOELECTRIC CRYSTAL UNIT COMPRISING A FLAT PIEZOELECTRIC CRYSTAL PLATE, AT LEAST TWO WIRES ATTACHED TO THE MAJOR FACES OF THE CRYSTAL PLATE, A SUPPORT STRUCTURE FOR SUSPENDING THE CRYSTAL BETWEEN SAID WIRES, SAID SUPPORT STRUCTURE COMPRISING ONE RELATIVELY RIGID MEMBER AND ONE RELATIVELY FLEXIBLE MEMBER, SAID RELATIVELY RIGID MEMBER HAVING A STIFFNESS COEFFICIENT OF AT LEAST 80 POUNDS PER INCH OF DEFLECTION AND SAID RELATIVELY FLEXIBLE MEMBER HAVING A STIFFNESS COEFFICIENT IN THE RANGE 0.5 TO 10 POUNDS PER INCH OF DEFLECTION AND A BASE MEMBER FOR MOUNTING EACH OF SAID MEMBERS IN SPACED PARALLEL RELATIONSHIP.
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) | 1971-02-19 | 1971-08-21 | 1972-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-19 | 1975-08-21 | 1976-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-19 | 1979-08-21 | 1980-02-20 | $7700.00 | Window Closed / Lapsed |