Patent US2177691A successfully refreshed from Google Patents.
US2177691A
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US
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Luminescent or phosphorescent body and the process of manufacturing the same
Assignee: General Electric Co
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Filing: 1936-06-25
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Granted: 1939-10-31
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Expires: 1956-06-25
Abstract
No abstract record available.
Inventors
- 👤 Dawihl Walther
- 👤 Fritze Otto
- 👤 Ruttenauer Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:25
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/02; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942
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) | 1942-10-30 | 1943-05-01 | 1943-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-10-30 | 1947-05-01 | 1947-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-10-30 | 1951-05-01 | 1951-10-31 | $7700.00 | Window Closed / Lapsed |