Patent US2493659A successfully refreshed from Google Patents.
US2493659A
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Getter structure for electric discharge tubes
Assignee: Hartford National Bank and Trust Co
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Filing: 1947-02-14
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Granted: 1950-01-03
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Expires: 1967-02-14
Abstract
No abstract record available.
Inventors
- 👤 Dorgelo Eduard Gerardus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:22
CPC Classifications
H; H01; H01J; H01J41/00; H01J41/12; H01J41/18; H01J41/20; H01J19/00; H01J19/28; H01J19/32; H01J19/36; H01J19/42; H01J29/00; H01J29/94; H01J7/00; H01J7/14; H01J7/18; H01J7/186; H01J2893/00; H01J2893/0001; H01J2893/0002; H01J2893/0012; H01J2893/0027
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-02 | 1953-07-04 | 1954-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-02 | 1957-07-04 | 1958-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-02 | 1961-07-04 | 1962-01-03 | $7700.00 | Window Closed / Lapsed |