US2440797A
Expired / Lapsed
US
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Stroboscopic index and method of index viewing
Assignee: Individual
•
Filing: 1944-04-29
•
Granted: 1948-05-04
•
Expires: 1964-04-29
Abstract
No abstract record available.
Inventors
- 👤 Jerome L Ciough
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:53
CPC Classifications
G; G01; G01P; G01P3/00; G01P3/36; G01P3/40; G09; G09F; G09F9/00; G09F9/30; Y; Y10; Y10S; Y10S40/00; Y10S40/902
Claims Analysis
Total Claims: 0
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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) | 1951-05-04 | 1951-11-03 | 1952-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-05-04 | 1955-11-03 | 1956-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-05-04 | 1959-11-03 | 1960-05-04 | $7700.00 | Window Closed / Lapsed |