US3409770A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-luminous light-emitting units
Assignee: United States Radium Corp
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Filing: 1964-09-28
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Granted: 1968-11-05
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Expires: 1984-09-28
Abstract
No abstract record available.
Inventors
- 👤 Jr Charles H Clapham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:07
CPC Classifications
F; F21; F21K; F21K2/00; C; C09; C09K; C09K11/00; C09K11/04; H; H01; H01J; H01J65/00; H01J65/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1739592A
Cited
US2344081A
Cited
US2706691A
Cited
US3038271A
Cited
US3197902A
Cited
US3270201A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-05 | 1972-05-06 | 1972-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-05 | 1976-05-06 | 1976-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-05 | 1980-05-06 | 1980-11-05 | $7700.00 | Window Closed / Lapsed |