Patent US2491342A successfully refreshed from Google Patents.
US2491342A
Expired / Lapsed
US
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Stroboscope
Assignee: Individual
•
Filing: 1946-06-13
•
Granted: 1949-12-13
•
Expires: 1966-06-13
Abstract
No abstract record available.
Inventors
- 👤 Townshend John Horace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:09
CPC Classifications
H; H05; H05B; H05B41/00; H05B41/14; H05B41/30; H05B41/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE22611E
Cited
GB235254A
Cited
US2186013A
Cited
US2043484A
Cited
US2136924A
Cited
US2409620A
Cited
US2435262A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-12 | 1953-06-13 | 1953-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-12 | 1957-06-13 | 1957-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-12 | 1961-06-13 | 1961-12-13 | $7700.00 | Window Closed / Lapsed |