Patent US3299711A successfully refreshed from Google Patents.
US3299711A
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US
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Method for the direct measurement of pressure differences
Assignee: Individual
•
Filing: 1963-08-20
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Granted: 1967-01-24
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Expires: 1983-08-20
Abstract
No abstract record available.
Inventors
- 👤 Hatschek Rudolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:33
CPC Classifications
G; G01; G01L; G01L23/00; G01L23/08; G01L23/10; G01L13/00; G01L13/02; G01L9/00; G01L9/02; G01L9/06; Y; Y10; Y10S; Y10S73/00; Y10S73/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
A METHOD FOR DIRECTLY MEASURING PRESSURE DIFFERENCES, WHEREIN PIEZOELECTRIC TRANSDUCERS ARE PROVIDED, COMPRISING, MEASURING THE INDIVIDUAL PRESSURES BY TWO HOMOPOLAR PIEZOELECTRIC TRANSDUCERS TRANSMITTING OUTPUT SIGNALS CORRESPONDING TO THE INDIVIDUAL PRESSURES, TRANSFORMING THE OUTPUT SIGNALS OF THE SAID TRANSDUCERS BY ELEC-
Claim 2
Independent Claim
40 words
A METHOD FOR DIRECTLY MEASURING PRESSURE DIFFERENCES, WHEREIN PIEZOELECTRIC TRANSDUCERS ARE PROVIDED, COMPRISING, MEASURING THE INDIVIDUAL PRESSURES BY TWO HOMOPOLAR PIEZOELECTRIC TRANSDUCERS TRANSMITTING OUTPUT SIGNALS CORRESPONDING TO THE INDIVIDUAL PRESSURES, TRANSFORMING THE OUTPUT SIGNALS OF THE SAID TRANSDUCERS BY ELEC-
References Cited (Backward Citations)
US1902184A
Cited
US2767336A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-23 | 1970-07-25 | 1971-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-23 | 1974-07-25 | 1975-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-23 | 1978-07-25 | 1979-01-24 | $7700.00 | Window Closed / Lapsed |