Patent US2646336A successfully refreshed from Google Patents.
US2646336A
Expired / Lapsed
US
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Direct writing electrocardiograph
Assignee: Individual
•
Filing: 1948-04-21
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Granted: 1953-07-21
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Expires: 1968-04-21
Abstract
No abstract record available.
Inventors
- 👤 Murray W Edinburg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:16
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/24; A61B5/316; A61B5/318; A61B5/333; A61B5/338
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US738839A
Cited
US757024A
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US899043A
Cited
US1964512A
Cited
US2216259A
Cited
US2439640A
Cited
US2412639A
Cited
US2454966A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-20 | 1957-01-19 | 1957-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-20 | 1961-01-19 | 1961-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-20 | 1965-01-19 | 1965-07-21 | $7700.00 | Window Closed / Lapsed |