US2825839A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grids for electric discharge devices
Assignee: International Standard Electric Corp
•
Filing: 1952-01-12
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Granted: 1958-03-04
•
Expires: 1972-01-12
Abstract
No abstract record available.
Inventors
- 👤 Beck Arnold Hugh William
- 👤 Cutting Alan Butler
- 👤 Rayner John William Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:07
CPC Classifications
H; H01; H01J; H01J19/00; H01J19/28; H01J19/38; H01J2893/00; H01J2893/0001; H01J2893/0012; H01J2893/0015; H01J2893/0016
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1708193A
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US1947412A
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US2036069A
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US2121597A
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US2189636A
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US2264735A
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US2577103A
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US2460120A
Cited
US2451360A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-03 | 1961-09-02 | 1962-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-03 | 1965-09-02 | 1966-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-03 | 1969-09-02 | 1970-03-04 | $7700.00 | Window Closed / Lapsed |