US3208927A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid junction
Assignee: Beckman Coulter Inc
•
Filing: 1961-10-23
•
Granted: 1965-09-28
•
Expires: 1981-10-23
Abstract
No abstract record available.
Inventors
- 👤 Edwin P Arthur
- 👤 Lynn B Leonard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:35
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/28; G01N27/401
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
63 words
A METHOD OF MAKING A LEAK STRUCTURE FOR A LIQUID JUNCTION OF A SALT BRIDGE TUBE, INCLUDING THE SEQUENTIAL STEPS OF: FORMING A GLASS PLUG FOR AN OPENING OF A TUBE; FRACTURING THE PLUG TO PROVIDE A PASSAGE THERETHROUGH WITH COMPLEMENTARY MATING SURFACES; AND SEALING THE FRACTURED PLUG IN THE OPENING TO PROVIDE A LEAK FOR THE TUBE ALONG THE COMPLEMENTARY MATING SURFACES.
Claim 2
Independent Claim
63 words
A METHOD OF MAKING A LEAK STRUCTURE FOR A LIQUID JUNCTION OF A SALT BRIDGE TUBE, INCLUDING THE SEQUENTIAL STEPS OF: FORMING A GLASS PLUG FOR AN OPENING OF A TUBE; FRACTURING THE PLUG TO PROVIDE A PASSAGE THERETHROUGH WITH COMPLEMENTARY MATING SURFACES; AND SEALING THE FRACTURED PLUG IN THE OPENING TO PROVIDE A LEAK FOR THE TUBE ALONG THE COMPLEMENTARY MATING SURFACES.
Claim 3
Dependent Claim
45 words
IN COMBINATION: A SALT BRIDGE TUBE OF NONCONDUCTIVE MATERIAL HAVING AN OPENING THEREIN; AND A PLUG SOLELY OF GLASS SEALED IN SAID OPENING, SAID PLUG HAVING A FRCTURE THERETHROUGH WITH COMPLEMENTARY MATING SURFACES DEFINING A MINUTE PASSAGE BETWEEN THE INTERIOR AND EXTERIOR OF SAID TUBE.
Claim 4
Dependent Claim
45 words
IN COMBINATION: A SALT BRIDGE TUBE OF NONCONDUCTIVE MATERIAL HAVING AN OPENING THEREIN; AND A PLUG SOLELY OF GLASS SEALED IN SAID OPENING, SAID PLUG HAVING A FRCTURE THERETHROUGH WITH COMPLEMENTARY MATING SURFACES DEFINING A MINUTE PASSAGE BETWEEN THE INTERIOR AND EXTERIOR OF SAID TUBE.
References Cited (Backward Citations)
US2058761A
Cited
US1779232A
Cited
US2387727A
Cited
US2345498A
Cited
US2705220A
Cited
US2927887A
Cited
US2925370A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-27 | 1969-03-29 | 1969-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-27 | 1973-03-29 | 1973-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-27 | 1977-03-29 | 1977-09-28 | $7700.00 | Window Closed / Lapsed |