US2756409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulse monitoring system
Assignee: Underwood Corp
•
Filing: 1952-07-23
•
Granted: 1956-07-24
•
Expires: 1972-07-23
Abstract
No abstract record available.
Inventors
- 👤 Lubkin Samuel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:10
CPC Classifications
G; G01; G01R; G01R31/00; G01R31/28; G01R31/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2435258A
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US2526595A
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US2547011A
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US2493543A
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US2597071A
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US2592825A
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US2624789A
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US2588049A
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US2679636A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-24 | 1960-01-23 | 1960-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-24 | 1964-01-23 | 1964-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-24 | 1968-01-23 | 1968-07-24 | $7700.00 | Window Closed / Lapsed |