US2949910A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phonocardiac catheter
Assignee: Individual
•
Filing: 1957-03-29
•
Granted: 1960-08-23
•
Expires: 1977-03-29
Abstract
No abstract record available.
Inventors
- 👤 James R Brown
- 👤 John D Wallace
- 👤 David H Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:25
CPC Classifications
A; A61; A61B; A61B7/00; A61B7/02; A61B7/023
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2486146A
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US2558563A
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US2634721A
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US2803129A
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US2849075A
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US2787160A
Cited
US2763153A
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US2799788A
Cited
US2812452A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-23 | 1964-02-22 | 1964-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-23 | 1968-02-22 | 1968-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-23 | 1972-02-22 | 1972-08-23 | $7700.00 | Window Closed / Lapsed |