Patent US3340866A successfully refreshed from Google Patents.
US3340866A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ingestible ph responsive radio transmitter
Assignee: Individual
•
Filing: 1964-07-01
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Granted: 1967-09-12
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Expires: 1984-07-01
Abstract
No abstract record available.
Inventors
- 👤 Noller Hans Gunter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:55
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/07; A61B5/073; A61B18/00; A61B18/04; A61B18/12; A61B18/14; A61B2018/1405; A61B2018/1435
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
70 words
AN INTERNAL RADIO PROBE FOR MEASURING HYDROGEN ION IN THE DIGESTIVE TRACT COMPRISING, IN COMBINATION: (A) A TRANSISTOR OSCILLATOR; (B) BATTERY MEANS FOR ENERGIZING SAID OSCILLATOR WHEN IMERSED IN THE FLUIDS OF SAID DIGESTIVE TRACT; (C) PH SENSING MEANS IN CIRCUIT WITH SAID OSCILLATOR FOR VARYING THE FREQUENCY OF OSCILLATION OF SAID OSCILLATOR RESPONSIVE TO A SENSED PH, SAID BATTERY MEANS AND SAID PH SENSING MEANS EACH INCLUDING TWO SPACED
References Cited (Backward Citations)
US2231320A
Cited
US2590584A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-11 | 1971-03-13 | 1971-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-11 | 1975-03-13 | 1975-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-11 | 1979-03-13 | 1979-09-12 | $7700.00 | Window Closed / Lapsed |