Patent US4562744A successfully refreshed from Google Patents.
US2419682A
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Electrocardiotachometer
Assignee: Individual
•
Filing: 1942-02-11
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Granted: 1947-04-29
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Expires: 1962-02-11
Abstract
No abstract record available.
Inventors
- 👤 Jr Victor Guillemin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:57
CPC Classifications
G; G01; G01R; G01R13/00; G01R13/04; Y; Y10; Y10S; Y10S128/00; Y10S128/901
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) | 1950-04-28 | 1950-10-28 | 1951-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-04-28 | 1954-10-28 | 1955-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-04-28 | 1958-10-28 | 1959-04-29 | $7700.00 | Window Closed / Lapsed |