Patent US1897731A successfully refreshed from Google Patents.
Patent US2186757A successfully refreshed from Google Patents.
US2186757A
Expired / Lapsed
US
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Photographic detection of slowly moving neutrons
Assignee: IG Farbenindustrie AG
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Filing: 1938-03-24
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Granted: 1940-01-09
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Expires: 1958-03-24
Abstract
No abstract record available.
Inventors
- 👤 Kallmann Hartmut
- 👤 Kuhn Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:44
CPC Classifications
G; G01; G01N; G01N23/00; G01N23/02; G01N23/04; G01N23/05; Y; Y10; Y10S; Y10S430/00; Y10S430/154
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1943-01-08 | 1943-07-10 | 1944-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-01-08 | 1947-07-10 | 1948-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-01-08 | 1951-07-10 | 1952-01-09 | $7700.00 | Window Closed / Lapsed |