US2451979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Indicating device
Assignee: Canadian Radium and Uranium Corp
•
Filing: 1943-09-04
•
Granted: 1948-10-19
•
Expires: 1963-09-04
Abstract
No abstract record available.
Inventors
- 👤 Rosenblum Solomon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:18
CPC Classifications
F; F21; F21V; F21V9/00; F21V9/30; F21V13/00; F21V13/02; F21V13/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US886782A
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US1374875A
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US1351935A
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US1373783A
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US1375816A
Cited
US1385798A
Cited
US1816220A
Cited
GB404801A
Cited
US2135538A
Cited
US2334766A
Cited
US2372209A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-10-19 | 1952-04-19 | 1952-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-10-19 | 1956-04-19 | 1956-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-10-19 | 1960-04-19 | 1960-10-19 | $7700.00 | Window Closed / Lapsed |