Patent US1995017A successfully refreshed from Google Patents.
US1995017A
Expired / Lapsed
US
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Material for discharge tube anodes
Assignee: Electrons Inc
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Filing: 1928-01-17
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Granted: 1935-03-19
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Expires: 1948-01-17
Abstract
No abstract record available.
Inventors
- 👤 Spanner Hans Joachim
- 👤 Carl J R H Von Wedel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:37
CPC Classifications
H; H01; H01J; H01J17/00; H01J17/02; H01J17/04; H01J17/10
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) | 1938-03-18 | 1938-09-17 | 1939-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-03-18 | 1942-09-17 | 1943-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-03-18 | 1946-09-17 | 1947-03-19 | $7700.00 | Window Closed / Lapsed |