US2671817A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroactive radiation screen
Assignee: Individual
•
Filing: 1949-11-18
•
Granted: 1954-03-09
•
Expires: 1969-11-18
Abstract
No abstract record available.
Inventors
- 👤 Karl B Groddeck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:16
CPC Classifications
G; G21; G21C; G21C15/00; G21C15/02; G21C15/10; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US255885A
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US781289A
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US1539611A
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US1664720A
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CH233011A
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US2480404A
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US2519785A
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GB618508A
Cited
US2519941A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-08 | 1957-09-07 | 1958-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-08 | 1961-09-07 | 1962-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-08 | 1965-09-07 | 1966-03-09 | $7700.00 | Window Closed / Lapsed |