US2535669A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric discharge tube and means for cooling the anode thereof
Assignee: Hartford National Bank and Trust Co
•
Filing: 1946-10-21
•
Granted: 1950-12-26
•
Expires: 1966-10-21
Abstract
No abstract record available.
Inventors
- 👤 Heijligers Joris Daniel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:22
CPC Classifications
H; H01; H01J; H01J19/00; H01J19/28; H01J19/32; H01J19/36; H01J2893/00; H01J2893/0001; H01J2893/0012; H01J2893/0027; Y; Y10; Y10S; Y10S165/00; Y10S165/903
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1565969A
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US1978424A
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US2166685A
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GB514651A
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US2289984A
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US2362044A
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US2324034A
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US2406121A
Cited
US2431157A
Cited
US2419233A
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US2434676A
Cited
US2455957A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-25 | 1954-06-26 | 1954-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-25 | 1958-06-26 | 1958-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-25 | 1962-06-26 | 1962-12-26 | $7700.00 | Window Closed / Lapsed |