Patent US3434151A successfully refreshed from Google Patents.
US3434151A
Expired / Lapsed
US
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Electrocardiographic recording system
Assignee: 3M Co
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Filing: 1967-10-20
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Granted: 1969-03-18
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Expires: 1987-10-20
Abstract
No abstract record available.
Inventors
- 👤 William F Bader
- 👤 Arney Landy Jr
- 👤 Marvin J Schmitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:33
CPC Classifications
H; H04; H04J; H04J3/00; A; A61; A61B; A61B5/00; A61B5/24; A61B5/316; A61B5/318; A61B5/339; A61B5/72; A61B5/7235; A61B5/7239
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-17 | 1972-09-16 | 1973-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-17 | 1976-09-16 | 1977-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-17 | 1980-09-16 | 1981-03-18 | $7700.00 | Window Closed / Lapsed |