Patent US2453720A successfully refreshed from Google Patents.
US2453720A
Expired / Lapsed
US
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Apparatus for detecting perforations in ammunition flash tubes
Assignee: Individual
•
Filing: 1944-10-30
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Granted: 1948-11-16
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Expires: 1964-10-30
Abstract
No abstract record available.
Inventors
- 👤 Meister Leo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:27
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/84; G01N21/88; Y; Y10; Y10S; Y10S209/00; Y10S209/933
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2341827A
Cited
US1874217A
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US2138645A
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DE628201C
Cited
US2221323A
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US2193590A
Cited
US2244228A
Cited
US2318856A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-11-16 | 1952-05-17 | 1952-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-11-16 | 1956-05-17 | 1956-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-11-16 | 1960-05-17 | 1960-11-16 | $7700.00 | Window Closed / Lapsed |