US3649367A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical generator
Assignee: Intermedics Inc
•
Filing: 1969-04-14
•
Granted: 1972-03-14
•
Expires: 1989-04-14
Abstract
Abstract HEAT SHIELD WHICH PREVENTS HEAT FROM RADIATING FROM THE SOURCE (HOT JUNCTION) TO THE CONTAINER (COLD JUNCTION) AND ALSO MAINTAINS THE VACUUM WITHIN THE CONTAINER. THE WALL OF THE CONTAINER IS COMPOSED OF TITANIUM WHICH IS COMPATIBLE WITH HUMAN TISSUE AND IS REJECTED BY THE BODY. A HEART PACER IS DISCLOSED WHICH HAS A LONG LIFE (10 OR 11 YEARS) AS COMPARED TO PRIOR-ART PACERS (2 OR 3 YEARS). THIS PACER INCLUDES AN EVACUATED CONTAINER WITHIN WHICH THERE IS A LONG-LIFE RADIOACTIVE HEAT SOURCE. A THERMOELECTRIC TAPE IS WRAPPED AROUND THE SOURCE AND HAS ITS HOT JUNCTION AT THE SOURCE AND ITS COLD JUNCTION AT THE WALL OF THE CONTAINER. THE TAPE INCLUDES A GETTERING
Inventors
- 👤 David L Purdy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:20
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/18; A61N1/32; A61N1/36; A61N1/372; A61N1/378; A61N1/375; A61N1/37512; G; G21; G21H; G21H1/00; G21H1/10; G21H1/103; H; H10; H10N; H10N10/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1975-03-14 | 1975-09-13 | 1976-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-14 | 1979-09-13 | 1980-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-14 | 1983-09-13 | 1984-03-14 | $7700.00 | Window Closed / Lapsed |