US2507696A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glow discharge device
Assignee: AT&T Inc
•
Filing: 1948-03-27
•
Granted: 1950-05-16
•
Expires: 1968-03-27
Abstract
No abstract record available.
Inventors
- 👤 Wallace A Depp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:07
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/12; H01J61/16; H01J17/00; H01J17/02; H01J17/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE209969C
Cited
US1603420A
Cited
DE349921C
Cited
US1735080A
Cited
US1900577A
Cited
US1995018A
Cited
US1965582A
Cited
US2331398A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-15 | 1953-11-14 | 1954-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-15 | 1957-11-14 | 1958-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-15 | 1961-11-14 | 1962-05-16 | $7700.00 | Window Closed / Lapsed |