Patent US2590101A successfully refreshed from Google Patents.
US2590101A
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US
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Tachistoscope
Assignee: Individual
•
Filing: 1949-04-18
•
Granted: 1952-03-25
•
Expires: 1969-04-18
Abstract
No abstract record available.
Inventors
- 👤 Ulrich K Henschke
- 👤 Hans A Mauch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:20
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/16; A61B5/163; A61B3/00; A61B3/02; A61B3/06; G; G02; G02B; G02B27/00; G02B27/02; G02B27/022; G02B27/024
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) | 1955-03-25 | 1955-09-24 | 1956-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-25 | 1959-09-24 | 1960-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-25 | 1963-09-24 | 1964-03-25 | $7700.00 | Window Closed / Lapsed |