US2572389A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnifier for pulse beat indicators
Assignee: Individual
•
Filing: 1948-06-11
•
Granted: 1951-10-23
•
Expires: 1968-06-11
Abstract
No abstract record available.
Inventors
- 👤 Wendell C Rice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:50
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/02; A61B5/024; A61B5/021
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE212110C
Cited
US1673513A
Cited
US1900285A
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US1900286A
Cited
US2039337A
Cited
US2341137A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-22 | 1955-04-23 | 1955-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-22 | 1959-04-23 | 1959-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-22 | 1963-04-23 | 1963-10-23 | $7700.00 | Window Closed / Lapsed |