US2648328A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric blood pressure recording system
Assignee: Hathaway Instruments Inc
•
Filing: 1950-01-28
•
Granted: 1953-08-11
•
Expires: 1970-01-28
Abstract
No abstract record available.
Inventors
- 👤 Claude M Hathaway
- 👤 Jr Warren De Blois Tilton
- 👤 Paul W Schafer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:00
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/02; A61B5/021; A61B5/0215
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1686504A
Cited
US1976707A
Cited
US2001537A
Cited
US842339A
Cited
US1403384A
Cited
FR627341A
Cited
GB548736A
Cited
US2600324A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-10 | 1957-02-09 | 1957-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-10 | 1961-02-09 | 1961-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-10 | 1965-02-09 | 1965-08-11 | $7700.00 | Window Closed / Lapsed |