US2731573A
Expired / Lapsed
US
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Ultrasonic coupling means for piezoelectric crystals
Assignee: Individual
•
Filing: 1952-10-17
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Granted: 1956-01-17
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Expires: 1972-10-17
Abstract
No abstract record available.
Inventors
- 👤 Hansen J Richard
- 👤 Sprengling Gerhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:53
CPC Classifications
B; B06; B06B; B06B1/00; B06B1/02; B06B1/06; H; H10; H10N; H10N30/00; H10N30/01; H10N30/07; H10N30/072; H10N30/073
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
33 words
A COUPLED PIEZO-ELECTRIC UNIT FOR HIGH FREQUENCY VIBRATIONS COMPRISING A PIEZOELECTRIC CRYSTAL, AN ACOUSTICAL TRANSMITTING MATERIAL, AND A BOND CONNECTING SAID CRYSTAL AND MATERIAL SELECTED FROM THE GROUP CONSISTING OF PARAMETHOXYBIPHENYL AND BENZIL.
Claim 2
Dependent Claim
33 words
A COUPLED PIEZO-ELECTRIC UNIT FOR HIGH FREQUENCY VIBRATIONS COMPRISING A PIEZOELECTRIC CRYSTAL, AN ACOUSTICAL TRANSMITTING MATERIAL, AND A BOND CONNECTING SAID CRYSTAL AND MATERIAL SELECTED FROM THE GROUP CONSISTING OF PARAMETHOXYBIPHENYL AND BENZIL.
References Cited (Backward Citations)
US2420864A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-16 | 1959-07-18 | 1960-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-16 | 1963-07-18 | 1964-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-16 | 1967-07-18 | 1968-01-17 | $7700.00 | Window Closed / Lapsed |