US2708657A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polarographic cells
Assignee: Individual
•
Filing: 1951-04-10
•
Granted: 1955-05-17
•
Expires: 1971-04-10
Abstract
No abstract record available.
Inventors
- 👤 Ladisch Rolf Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:58
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/28; G01N27/30; G01N27/34; G01N27/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
A POLAROGRAPHIC CELL COMPRISING AN UPRIGHT CASING OPEN AT THE TOP AND ADAPTED TO HOLD THE TEST SOLUTION, A MEMBRANE SUPPORT WITHIN SAID CASING, A BOTTOM WALL ATTACHED TO SAID CASING AND PROVIDING A MERCURY-COLLECTING WELL OR TROUGH WITHIN THE CASING, AND A VERY THIN NON-SELECTIVE RESINOUS AND SLIGHTLY PERMEABLE MEMBRANE FIXED TO SAID MEMBRANE SUPPORT AND BEING GENERALLY DIS-
Claim 2
Dependent Claim
60 words
A POLAROGRAPHIC CELL COMPRISING AN UPRIGHT CASING OPEN AT THE TOP AND ADAPTED TO HOLD THE TEST SOLUTION, A MEMBRANE SUPPORT WITHIN SAID CASING, A BOTTOM WALL ATTACHED TO SAID CASING AND PROVIDING A MERCURY-COLLECTING WELL OR TROUGH WITHIN THE CASING, AND A VERY THIN NON-SELECTIVE RESINOUS AND SLIGHTLY PERMEABLE MEMBRANE FIXED TO SAID MEMBRANE SUPPORT AND BEING GENERALLY DIS-
References Cited (Backward Citations)
US2288180A
Cited
US2510262A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-05-16 | 1958-11-15 | 1959-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-16 | 1962-11-15 | 1963-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-16 | 1966-11-15 | 1967-05-17 | $7700.00 | Window Closed / Lapsed |