Patent US3290521A successfully refreshed from Google Patents.
US3290521A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electro-mechanical transducer
Assignee: Individual
•
Filing: 1963-10-31
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Granted: 1966-12-06
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Expires: 1983-10-31
Abstract
No abstract record available.
Inventors
- 👤 George M Coleman
- 👤 Ruch Robert
- 👤 Smith Jerome Frost
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:52
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/103; A61B5/11; A61B5/1102; A61B5/113; A61B5/1135; A61B2562/00; A61B2562/02; A61B2562/0219; A61B2562/16; A61B2562/164; A61B2562/168
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
AN ELECTRO-MECHNICAL TRANSDUCER COMPRISING: A HOLLOW TUBE, SAID HOLLOW TUBE HAVING AN INSIDE DIAMETER LESS THAN ONE MILLIMETER; A PLURALITY OF LAYERS OF NON-WETTING CONDUCTIVE LIQUID WITHIN SAID TUBE; A LIQUID ELECTROLYTE BETWEEN EACH OF SAID LAYERS FORMING DISTINCT SECTIONS OF ELECTROLYTE; A PLURALITY OF CONDUCTORS, EACH PROJECTING INTO A DIFFERENT ONE OF SAID LAYERS, THE WALLS OF SAID TUBE BEING OF SOFT PLIABLE MATERIAL HAVING HIGH COMPLIANCE TO TRANSMIT PRESSURE WAVES THROUGH THE WALL TO SAID LIQUID WITHIN THE TUBE, THE HOLLOW TUBE BEING EASILY FLEXED TO ANY POSITION, WHEREBY A VOLTAGE IS GENERATED BETWEEN SAID CONDUCTORS IN RESPONSE TO DISTORTIONS OF SAID TUBE.
Claim 2
Dependent Claim
105 words
AN ELECTRO-MECHNICAL TRANSDUCER COMPRISING: A HOLLOW TUBE, SAID HOLLOW TUBE HAVING AN INSIDE DIAMETER LESS THAN ONE MILLIMETER; A PLURALITY OF LAYERS OF NON-WETTING CONDUCTIVE LIQUID WITHIN SAID TUBE; A LIQUID ELECTROLYTE BETWEEN EACH OF SAID LAYERS FORMING DISTINCT SECTIONS OF ELECTROLYTE; A PLURALITY OF CONDUCTORS, EACH PROJECTING INTO A DIFFERENT ONE OF SAID LAYERS, THE WALLS OF SAID TUBE BEING OF SOFT PLIABLE MATERIAL HAVING HIGH COMPLIANCE TO TRANSMIT PRESSURE WAVES THROUGH THE WALL TO SAID LIQUID WITHIN THE TUBE, THE HOLLOW TUBE BEING EASILY FLEXED TO ANY POSITION, WHEREBY A VOLTAGE IS GENERATED BETWEEN SAID CONDUCTORS IN RESPONSE TO DISTORTIONS OF SAID TUBE.
References Cited (Backward Citations)
US2837082A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-05 | 1970-06-06 | 1970-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-05 | 1974-06-06 | 1974-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-05 | 1978-06-06 | 1978-12-06 | $7700.00 | Window Closed / Lapsed |