US2587254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Indicating pocket ionization chamber
Assignee: Victoreen Instrument Co
•
Filing: 1948-04-16
•
Granted: 1952-02-26
•
Expires: 1968-04-16
Abstract
No abstract record available.
Inventors
- 👤 John A Victoreen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:48
CPC Classifications
H; H01; H01J; H01J47/00; H01J47/02; H01J47/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE128843C
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GB400653A
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US500236A
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US627155A
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FR405750A
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US1294710A
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DE319202C
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US1933063A
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US2022117A
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US2192148A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-25 | 1955-08-27 | 1956-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-25 | 1959-08-27 | 1960-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-25 | 1963-08-27 | 1964-02-26 | $7700.00 | Window Closed / Lapsed |