US2661336A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Getter material for electron discharge devices
Assignee: RCA Corp
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Filing: 1948-11-17
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Granted: 1953-12-01
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Expires: 1968-11-17
Abstract
No abstract record available.
Inventors
- 👤 Ernest A Lederer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:52
CPC Classifications
H; H01; H01J; H01J7/00; H01J7/14; H01J7/18; H01J7/183
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
95 words
IN AN ELECTRON DISCHARGE DEVICE PROCESSED AT RELATIVELY HIGH TEMPERATURES, A GETTER COMPRISING AN UNREDUCED MATERIAL CONSISTING OF BARIUM CERATE HAVING THE CHEMICAL EXPRESSION BAO.CAO2 AND BEING THE REACTING PRODUCT OF BARIUM CARBONATE AND CERIUM DIOXIDE WITHIN THE RANGE OF ONE MOLECULAR PART OF BARIUM CARBONATE AND ONE MOLECULAR PART OF CERIUM DIOXIDE TO FIVE MOLECULAR PARTS OF BARIM CARBONATE, AND THREE MOLECULAR PARTS OF CERIUM DIOXIDE; AND A REDUCING METAL OF THE GROUP CONSISTING OF TANTALUM, TUNGSTEN, MOLYBDENUM, COLUMBIUM, TITANIUM, ALUMINUM, MISCH METAL AND BERYLLIUM MIXED WITH SAID MATERIAL TO PROVIDE A MIXTURE IN
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US2111460A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-30 | 1957-06-01 | 1957-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-30 | 1961-06-01 | 1961-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-30 | 1965-06-01 | 1965-12-01 | $7700.00 | Window Closed / Lapsed |