US1947417A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric discharge tube
Assignee: Individual
•
Filing: 1932-02-29
•
Granted: 1934-02-13
•
Expires: 1952-02-29
Abstract
No abstract record available.
Inventors
- 👤 Holst Gilles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:09
CPC Classifications
H; H01; H01J; H01J5/00; H01J5/02; H01J5/04; H01J19/00; H01J19/28; H01J19/30; H01J35/00; H01J35/02; H01J35/04; H01J35/08; H01J35/12; H01J5/32; H01J5/40; H01J5/42; H01J2893/00; H01J2893/0001; H01J2893/0012; H01J2893/0013; H01J2893/0019; H01J2893/002; H01J2893/0033; H01J2893/0034
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) | 1937-02-12 | 1937-08-14 | 1938-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-02-12 | 1941-08-14 | 1942-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-02-12 | 1945-08-14 | 1946-02-13 | $7700.00 | Window Closed / Lapsed |