US2953684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-luminous light sources
Assignee: United States Radium Corp
•
Filing: 1957-06-20
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Granted: 1960-09-20
•
Expires: 1977-06-20
Abstract
No abstract record available.
Inventors
- 👤 John G Machutchin
- 👤 David L Prosser
- 👤 Charles H Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:55
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/22; 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)
US332210A
Cited
US1312312A
Cited
US2361319A
Cited
US2490091A
Cited
US2761069A
Cited
US2892086A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-20 | 1964-03-21 | 1964-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-20 | 1968-03-21 | 1968-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-20 | 1972-03-21 | 1972-09-20 | $7700.00 | Window Closed / Lapsed |