Patent US3630875A successfully refreshed from Google Patents.
US3630875A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hygrometer electrolytic cell
Assignee: Beckman Coulter Inc
•
Filing: 1970-03-10
•
Granted: 1971-12-28
•
Expires: 1990-03-10
Abstract
Abstract AN HYGROMETER ELECTROLYTIC CELL HAVING AS AN ELECTROLYTE AN ANHYDRIDE FORMED FROM AN ACID OF AN ELEMENT SELECTED FROM THE GROUP CONSISTING OF ALUMINUM, BORON, GROUP IV-A ELEMENTS AND GROUP V-A ELEMENTS. THE ACID HAS BLOCKED POLYMERIZATION SITES AND CONTAINS NOT MORE THAN THE EQUIVALENT OF 19 CARBON ATOMS.
Inventors
- 👤 Fernand B Kuffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:04
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/416; G01N27/42; G01N27/423
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) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |