US3509878A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vectorcardiograph
Assignee: Individual
•
Filing: 1968-05-23
•
Granted: 1970-05-05
•
Expires: 1988-05-23
Abstract
No abstract record available.
Inventors
- 👤 Joseph D Shaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:06
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/24; A61B5/316; A61B5/318; A61B5/333; A61B5/338; A61B5/339; A61B5/341
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2501791A
Cited
US2610102A
Cited
US2686222A
Cited
US2869965A
Cited
US3090828A
Cited
US3214765A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-04 | 1973-11-03 | 1974-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-04 | 1977-11-03 | 1978-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-04 | 1981-11-03 | 1982-05-05 | $7700.00 | Window Closed / Lapsed |