Patent US2952793A successfully refreshed from Google Patents.
US2952793A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glow lamp
Assignee: TDK Micronas GmbH
•
Filing: 1957-09-27
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Granted: 1960-09-13
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Expires: 1977-09-27
Abstract
No abstract record available.
Inventors
- 👤 Leslie C Merrill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:16
CPC Classifications
H; H01; H01J; H01J17/00; H01J17/38; H01J17/40; H01J17/44; H01J61/00; H01J61/64; H01J2893/00; H01J2893/0064; H01J2893/0065; H01J2893/0067
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2796558A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-13 | 1964-03-14 | 1964-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-13 | 1968-03-14 | 1968-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-13 | 1972-03-14 | 1972-09-13 | $7700.00 | Window Closed / Lapsed |