US2756203A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glass electrodes
Assignee: Beckman Coulter Inc
•
Filing: 1953-03-17
•
Granted: 1956-07-24
•
Expires: 1973-03-17
Abstract
No abstract record available.
Inventors
- 👤 Jr Paul T Gilbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:41
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/28; G01N27/30; G01N27/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
AS AN ARTICLE OF MANUFACTURE, A GLASS ELECTRODE FOR PH MEASUREMENTS CHARACTERIZED BY HAVING A HIGH-STRENGTH BLOWN BULBOUS PORTION AT THE END OF A TUBE OF STEM GLASS, SAID BLOWN BULBOUS PORTION COMPRISING A MEMBRANE OF PH-SENSITIVE GLASS FUSED TO A TERMINAL PORTION OF SAID STEM GLASS AT AN ANNULAR JUNCTION ZONE, THE SPHERICITY OF THE TOTAL BLOWN BULBOUS PORTION BEING BETWEEN ABOUT .4 AND .65, SUCH SPHERICITY BEING THE RATIO OF THE EXTERNAL AREA OF SAIAD BLOWN BULBONS PORTION TO THAT OF A SPHERE OF THE SAME DIAMETER, SAID JUNCTION ZONE BEING A ZONE OF COMPOSITIONAL DISCONTINUITY AS BETWEEN THE GLASSES ON OPPOSITE SIDES THEREOF, NO SUBSTANTIAL PORTION OF SAID TUBE OF STEM GLASS ABOVE AND CLOSE TO SAID JUNCTION ZONE BEING SUBSTANTIALLY SMALLER IN EXTERNAL DIAMETER THAN THE EXTERNAL DIAMETER OF SAID MEMBRANE IN THE PLANE OF SAID ANNULAR JUNCTION ZONE.
Claim 2
Dependent Claim
143 words
AS AN ARTICLE OF MANUFACTURE, A GLASS ELECTRODE FOR PH MEASUREMENTS CHARACTERIZED BY HAVING A HIGH-STRENGTH BLOWN BULBOUS PORTION AT THE END OF A TUBE OF STEM GLASS, SAID BLOWN BULBOUS PORTION COMPRISING A MEMBRANE OF PH-SENSITIVE GLASS FUSED TO A TERMINAL PORTION OF SAID STEM GLASS AT AN ANNULAR JUNCTION ZONE, THE SPHERICITY OF THE TOTAL BLOWN BULBOUS PORTION BEING BETWEEN ABOUT .4 AND .65, SUCH SPHERICITY BEING THE RATIO OF THE EXTERNAL AREA OF SAIAD BLOWN BULBONS PORTION TO THAT OF A SPHERE OF THE SAME DIAMETER, SAID JUNCTION ZONE BEING A ZONE OF COMPOSITIONAL DISCONTINUITY AS BETWEEN THE GLASSES ON OPPOSITE SIDES THEREOF, NO SUBSTANTIAL PORTION OF SAID TUBE OF STEM GLASS ABOVE AND CLOSE TO SAID JUNCTION ZONE BEING SUBSTANTIALLY SMALLER IN EXTERNAL DIAMETER THAN THE EXTERNAL DIAMETER OF SAID MEMBRANE IN THE PLANE OF SAID ANNULAR JUNCTION ZONE.
References Cited (Backward Citations)
US2311977A
Cited
US2346470A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-24 | 1960-01-23 | 1960-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-24 | 1964-01-23 | 1964-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-24 | 1968-01-23 | 1968-07-24 | $7700.00 | Window Closed / Lapsed |