US3402492A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Encapsulated radioactive light sources
Assignee: United States Radium Corp
•
Filing: 1965-05-12
•
Granted: 1968-09-24
•
Expires: 1985-05-12
Abstract
No abstract record available.
Inventors
- 👤 Jr Charles H Clapham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:01
CPC Classifications
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)
US3031519A
Cited
US2953684A
Cited
US3026436A
Cited
US2994148A
Cited
US3038271A
Cited
US3197902A
Cited
US3260846A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-24 | 1972-03-25 | 1972-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-24 | 1976-03-25 | 1976-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-24 | 1980-03-25 | 1980-09-24 | $7700.00 | Window Closed / Lapsed |