Patent US2421182A successfully refreshed from Google Patents.
US2421182A
Expired / Lapsed
US
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Stroboscope
Assignee: Individual
•
Filing: 1943-10-29
•
Granted: 1947-05-27
•
Expires: 1963-10-29
Abstract
No abstract record available.
Inventors
- 👤 Robert T Bayne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:56
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/08; H01J31/50; H01J31/506
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB252779A
Cited
US2072651A
Cited
US2075717A
Cited
US2131185A
Cited
US2091862A
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US2156813A
Cited
US2189321A
Cited
US2151785A
Cited
GB515077A
Cited
US2331317A
Cited
US2363359A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-05-26 | 1950-11-25 | 1951-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-05-26 | 1954-11-25 | 1955-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-05-26 | 1958-11-25 | 1959-05-27 | $7700.00 | Window Closed / Lapsed |