US2547200A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Getter structure for electric discharge tubes
Assignee: Hartford National Bank and Trust Co
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Filing: 1946-11-22
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Granted: 1951-04-03
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Expires: 1966-11-22
Abstract
No abstract record available.
Inventors
- 👤 Dorgelo Eduard Gerardus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:35
CPC Classifications
H; H01; H01J; H01J41/00; H01J41/12; H01J41/14; H01J41/16; H01J1/00; H01J1/02; H01J1/13; H01J1/20; H01J29/00; H01J29/84; H01J29/94; H01J7/00; H01J7/14; H01J7/18
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) | 1954-04-02 | 1954-10-02 | 1955-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-02 | 1958-10-02 | 1959-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-02 | 1962-10-02 | 1963-04-03 | $7700.00 | Window Closed / Lapsed |