Patent US3605723A successfully refreshed from Google Patents.
US3605723A
Expired / Lapsed
US
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Blood pressure monitor
Assignee: F Hoffmann La Roche AG
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Filing: 1969-09-03
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Granted: 1971-09-20
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Expires: 1989-09-03
Abstract
Abstract APPARTUS FOR AUTOMATICALLY IMPLEMENTING INDIRECT ARTERIAL BLOOD PRESSURE MEASUREMENT WITH A TRANSMITTERRECEIVER OPERATION FOR DERIVING DOPPLER SHIFTED INFORMATION DUE TO ARTERIAL WALL MOVEMENT UNDER EXTERNAL PRESSURE, BY OBSERVING AND SELECTIVELY MONITORING ELECTRICAL DOPLER SIGNALS REPRESENTATIVE OF THE INFORMATION THROUGH A FILTER ARRANGEMENT OPERATING IN A FIRST AND SECOND BRAND PASS FREQUENCY RANGE, WHERE THE SECOND BAND PASS FREQUENCY RANGE IS EMPLOYED INSTEAD OF THE FIRST ON THE BASIS OF CERTAIN CRITERION OBSERVED IN MONITORING THE ARTERIAL MOVEMENT.
Inventors
- 👤 Eugene King
- 👤 Harold Lee Massie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:56
CPC Classifications
A; A61; A61B; A61B8/00; A61B8/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |