US2764858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of electrode capsules
Assignee: Ethyl Corp
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Filing: 1954-01-25
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Granted: 1956-10-02
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Expires: 1974-01-25
Abstract
No abstract record available.
Inventors
- 👤 Shirl E Cook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:12
CPC Classifications
H; H01; H01J; H01J19/00; H01J19/42; H01J2893/00; H01J2893/0001; H01J2893/0002; H01J2893/0005; Y; Y10; Y10S; Y10S53/00; Y10S53/03
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
132 words
THE METHOD OF CHARGING AN ELONGATED, GLASS WALLED ELECTRODE CAPSULE WITH A PURIFIED ALKALI METAL SEPCIMEN, SAID CAPSULE BEING PROVIDED WITH AN ELECTRICAL LEAD WIRE PASSING THROUGH THE WALL THEREOF FOR CONTACT WITH THE ALKALI METAL SPECIMEN, AND WITH A BRANCH CONDUIT OF RESTRICTED CROSS SECTION SURMOUNTED BY A CUP PORTION, COMPRISING INSERTING IN SAID CUP PORTION A SOLID ALKALI METAL SPECIMEN HAVING SURFACE OXIDE IMPURITIES, APPLYING A VACCUUM TO THE CUP PORION TO EVACUATE THE CAPSULE AND CONDUIT AND MELTING SAID ALKALI METAL BY THE APPLICATION OF HEAT, THEN DISCONTINUING THE VACUUM AND APPLYING A POSITIVE PRESSURE OF INERT GAS TO THE MELTED ALKALI METAL, AND FORCING THE ALKALI METAL THROUGH SAID CONDUIT WHILE RETAINING THE SURFACE OXIDE IMPURITIES ON THE WALLS OF SAID CUP PORTION, AND THEN SEALING SAID CONDUIT.
References Cited (Backward Citations)
US2097307A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-02 | 1960-04-02 | 1960-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-02 | 1964-04-02 | 1964-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-02 | 1968-04-02 | 1968-10-02 | $7700.00 | Window Closed / Lapsed |