Patent US3318649A successfully refreshed from Google Patents.
US3318649A
Expired / Lapsed
US
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Charging electronic tubes with mercury
Assignee: KING LAB Inc
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Filing: 1963-10-11
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Granted: 1967-05-09
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Expires: 1983-10-11
Abstract
No abstract record available.
Inventors
- 👤 Jr Douglas V Keller
- 👤 Frederick P Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:36
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/38; H01J9/395; H01J17/00; H01J17/38; H01J17/48; H01J17/49; H01J2893/00; H01J2893/0069
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
THE METHOD OF CHARGING AN ELECTRONIC TUBE WITH MERCURY, THE METHOD CONSISTING IN PREPARING AN ALLOY COMPOSED OF MERCURY AND A METAL SELECTED FROM GROUPS IA, IIA AND III OF THE PERIODIC TABLE, INSERTING A QUANTITY OF SAID ALLOY IN THE TUBE, SEALING THE TUBE AND HEATING THE ALLOY TO A TEMPERATURE SUFFICIENT TO LIBERATE THE MERCURY.
Claim 2
Independent Claim
57 words
THE METHOD OF CHARGING AN ELECTRONIC TUBE WITH MERCURY, THE METHOD CONSISTING IN PREPARING AN ALLOY COMPOSED OF MERCURY AND A METAL SELECTED FROM GROUPS IA, IIA AND III OF THE PERIODIC TABLE, INSERTING A QUANTITY OF SAID ALLOY IN THE TUBE, SEALING THE TUBE AND HEATING THE ALLOY TO A TEMPERATURE SUFFICIENT TO LIBERATE THE MERCURY.
References Cited (Backward Citations)
US1855901A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-05-08 | 1970-11-07 | 1971-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-08 | 1974-11-07 | 1975-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-08 | 1978-11-07 | 1979-05-09 | $7700.00 | Window Closed / Lapsed |