US1990972A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diagnostic instrument
Assignee: Individual
•
Filing: 1933-04-19
•
Granted: 1935-02-12
•
Expires: 1953-04-19
Abstract
No abstract record available.
Inventors
- 👤 Walter A Arnesen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:55
CPC Classifications
A; A61; A61B; A61B1/00; A61B1/307; A61B1/06; A61B1/0661; A61B1/0669; A61B1/227; A61B1/31
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1938-02-11 | 1938-08-13 | 1939-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-02-11 | 1942-08-13 | 1943-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-02-11 | 1946-08-13 | 1947-02-12 | $7700.00 | Window Closed / Lapsed |