Patent US1924695A successfully refreshed from Google Patents.
US3500823A
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Electrocardiographic and bioelectric capacitive electrode
Assignee: United States Department of the Air Force
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Filing: 1967-11-20
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Granted: 1970-03-17
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Expires: 1987-11-20
Abstract
No abstract record available.
Inventors
- 👤 Philip C Richardson
- 👤 Alfredo Lopez Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:00
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/24; A61B5/30; A61B5/302; A61B5/307; A61B5/308; A61N; A61N1/00; A61N1/02; A61N1/04; A61N1/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-16 | 1973-09-15 | 1974-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-16 | 1977-09-15 | 1978-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-16 | 1981-09-15 | 1982-03-17 | $7700.00 | Window Closed / Lapsed |