US2105463A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum tube
Assignee: Individual
•
Filing: 1927-10-24
•
Granted: 1938-01-18
•
Expires: 1947-10-24
Abstract
No abstract record available.
Inventors
- 👤 Henry G Cordes
- 👤 Bertha L Cordes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:52
CPC Classifications
H; H01; H01J; H01J13/00; H01J13/50; H01J17/00; H01J17/02; H01J17/28; H01J2893/00; H01J2893/0072; H01J2893/0088
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) | 1941-01-17 | 1941-07-19 | 1942-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-01-17 | 1945-07-19 | 1946-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-01-17 | 1949-07-19 | 1950-01-18 | $7700.00 | Window Closed / Lapsed |