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US2203898A
Expired / Lapsed
US
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Luminescent material
Assignee: General Electric Co
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Filing: 1938-05-26
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Granted: 1940-06-11
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Expires: 1958-05-26
Abstract
No abstract record available.
Inventors
- 👤 Vries Reinier W P De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:40
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/70; C09K11/02; C09K11/56; C09K11/562; C09K11/565; C09K11/63
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) | 1943-06-11 | 1943-12-11 | 1944-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-06-11 | 1947-12-11 | 1948-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-06-11 | 1951-12-11 | 1952-06-11 | $7700.00 | Window Closed / Lapsed |