US1595870A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric vacuum-tube device and the like
Assignee: Metropolitan Vickers Electrical Co Ltd
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Filing: 1924-03-29
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Granted: 1926-08-10
•
Expires: 1944-03-29
Abstract
No abstract record available.
Inventors
- 👤 Robinson Ernest Yeoman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:09
CPC Classifications
H; H01; H01J; H01J19/00; H01J19/28; H01J19/32; H01J19/36; H01J2893/00; H01J2893/0001; H01J2893/0012; H01J2893/0027
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1929-08-09 | 1930-02-08 | 1930-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1933-08-09 | 1934-02-08 | 1934-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1937-08-09 | 1938-02-08 | 1938-08-10 | $7700.00 | Window Closed / Lapsed |