Patent US3705089A successfully refreshed from Google Patents.
US3705089A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reference electrode half cell
Assignee: DS MEDICAL PRODUCTS Co A CORP
•
Filing: 1970-09-28
•
Granted: 1972-12-05
•
Expires: 1990-09-28
Abstract
Abstract A REFERENCE ELECTRODE HALF CELL HAS AN ELONGATED FLEXIBLE ELECTRICALLY INSULATED TUBE HAVING OPPOSITE OPEN ENDS, A SILVER WIRE POSITIONED PARTIALLY WITHIN THE TUBE AT ONE END THEREOF AND EXTENDING OUTWARDLY FROM THE ONE END, THE TUBE BONDED TO THE SILVER WIRE AT THE END, A COATING OF SILVER CHLORIDE AN A PORTION OF THE SILVER WIRE POSITIONED WITHIN THE TUBE, AND AT LEAST ONE GELLED EQUITRANSFERENT SALT SOLUTION FILLING THE TUBE IN CONTACT WITH THE SILVER CHLORIDE COATING ON THE SILVER WIRE AND IN CONTACT WITH THE OPPOSITE OPEN END OF THE TUBE.
Inventors
- 👤 Willard T Grubb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:53
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/28; G01N27/30; G01N27/301
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) | 1975-12-05 | 1976-06-05 | 1976-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-05 | 1980-06-05 | 1980-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-05 | 1984-06-05 | 1984-12-05 | $7700.00 | Window Closed / Lapsed |