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Patent US2049164A successfully refreshed from Google Patents.
US2049164A
Expired / Lapsed
US
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Electric discharge device
Assignee: Hygrade Sylvania Corp
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Filing: 1933-12-02
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Granted: 1936-07-28
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Expires: 1953-12-02
Abstract
No abstract record available.
Inventors
- 👤 Kahl Maurice Irwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:02
CPC Classifications
H; H01; H01J; H01J19/00; H01J19/42; H01J19/50; H01J19/52; H01J2893/00; H01J2893/0001; H01J2893/0002; H01J2893/0005; H01J2893/0009
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) | 1939-07-28 | 1940-01-27 | 1940-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-07-28 | 1944-01-27 | 1944-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-07-28 | 1948-01-27 | 1948-07-28 | $7700.00 | Window Closed / Lapsed |