Patent US3221731A successfully refreshed from Google Patents.
US3221731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for evaluating the condition of the heart muscle
Assignee: Individual
•
Filing: 1962-05-31
•
Granted: 1965-12-07
•
Expires: 1982-05-31
Abstract
No abstract record available.
Inventors
- 👤 Annis Martin
- 👤 George W Clark
- 👤 Jr Gilbert S Greenberg
- 👤 Frank R Paolini
- 👤 Jr Edwin C Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:57
CPC Classifications
A; A61; A61B; A61B6/00; A61B6/40; A61B6/4057; A61B5/00; A61B5/02; A61B5/026; A61B5/0275; A61B6/42; A61B6/4208; A61B6/4258; A61B6/50; A61B6/507
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
159 words
A MACHINE FOR DETERMINING THE CONDITION OF THE HEART MUSCLE FOR USE WITH MEANS FOR INFUSING RADIOACTIVE MATERIAL OF THE TYPE ABSORBED BY THE BODY MUSCLES INTO THE BLOOD SYSTEM OF A PATIENT, SAID APPARATUS COMPRISING IN COMBINATION, MEANS FOR MONITORING THE RADIOACTIVITY OF THE PATIENT''S BLOOD AND PROVIDING A SINGLE INDICATIVE THEREOF, TWO RADIATION DETECTOR UNITS, EACH OF SAID RADIATION DETECTOR UNITS BEING MOUNTED FOR ADJUSTMENT IN COMPLEMENTARY POSITION RELATIVE TO THE CHEST OF THE PATIENT, ONE ON THE LEFT SIDE AND THE OTHER ON THE RIGHT SIDE, CIRCUITRY RESPONSIVE TO EACH DETECTOR UNIT FOR PROVIDING A SINGLE INDICATIVE OF THE SENSED RADIATION, MEANS FOR SUBTRACTING THE SIGNAL FROM THE DETECTOR UNIT POSITIONED RELATIVE TO THE RIGHT SIDE OF THE PATIENT FROM THE SIGNAL FROM THE DETECTOR UNIT POSITIONED RELATIVE TO THE LEFT SIDE OF THE PATIENT TO PROVIDE A DIFFERENCE SIGNAL, AND MEANS FOR RECORDING SAID BLOOD RADIOACTIVITY SIGNAL AND SAID DIFFERENCE SIGNAL AS FUNCTIONS OF TIME.
Claim 2
Dependent Claim
159 words
A MACHINE FOR DETERMINING THE CONDITION OF THE HEART MUSCLE FOR USE WITH MEANS FOR INFUSING RADIOACTIVE MATERIAL OF THE TYPE ABSORBED BY THE BODY MUSCLES INTO THE BLOOD SYSTEM OF A PATIENT, SAID APPARATUS COMPRISING IN COMBINATION, MEANS FOR MONITORING THE RADIOACTIVITY OF THE PATIENT''S BLOOD AND PROVIDING A SINGLE INDICATIVE THEREOF, TWO RADIATION DETECTOR UNITS, EACH OF SAID RADIATION DETECTOR UNITS BEING MOUNTED FOR ADJUSTMENT IN COMPLEMENTARY POSITION RELATIVE TO THE CHEST OF THE PATIENT, ONE ON THE LEFT SIDE AND THE OTHER ON THE RIGHT SIDE, CIRCUITRY RESPONSIVE TO EACH DETECTOR UNIT FOR PROVIDING A SINGLE INDICATIVE OF THE SENSED RADIATION, MEANS FOR SUBTRACTING THE SIGNAL FROM THE DETECTOR UNIT POSITIONED RELATIVE TO THE RIGHT SIDE OF THE PATIENT FROM THE SIGNAL FROM THE DETECTOR UNIT POSITIONED RELATIVE TO THE LEFT SIDE OF THE PATIENT TO PROVIDE A DIFFERENCE SIGNAL, AND MEANS FOR RECORDING SAID BLOOD RADIOACTIVITY SIGNAL AND SAID DIFFERENCE SIGNAL AS FUNCTIONS OF TIME.
References Cited (Backward Citations)
US3052756A
Cited
US2920215A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-06 | 1969-06-07 | 1969-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-06 | 1973-06-07 | 1973-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-06 | 1977-06-07 | 1977-12-07 | $7700.00 | Window Closed / Lapsed |