US3420223A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrode for biological recording
Assignee: National Aeronautics and Space Administration
•
Filing: 1964-12-31
•
Granted: 1969-01-07
•
Expires: 1984-12-31
Abstract
No abstract record available.
Inventors
- 👤 Joe L Day
- 👤 Maxwell W Lippitt Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:22
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/02; A61N1/04; A61N1/0404; A61N1/0472; A61N1/0492; A61B; A61B5/00; A61B5/24; A61B5/25; A61B5/251; A61B5/257; A61B5/263; A61B5/265; A61B5/271; A61B5/273; A61N1/048; A61B2562/00; A61B2562/02; A61B2562/0209; A61B2562/0215
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1972-01-07 | 1972-07-08 | 1973-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-07 | 1976-07-08 | 1977-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-07 | 1980-07-08 | 1981-01-07 | $7700.00 | Window Closed / Lapsed |