US2325490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure indicating method and apparatus
Assignee: Individual
•
Filing: 1942-01-09
•
Granted: 1943-07-27
•
Expires: 1962-01-09
Abstract
No abstract record available.
Inventors
- 👤 Herbert O Elftman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:33
CPC Classifications
G; G01; G01L; G01L1/00; G01L1/24; G01L1/247; A; A61; A61B; A61B5/00; A61B5/117; A61B5/1171; A61B5/1174; G01G; G01G19/00; G01G19/44; G01M; G01M99/00
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) | 1946-07-26 | 1947-01-25 | 1947-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-07-26 | 1951-01-25 | 1951-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-07-26 | 1955-01-25 | 1955-07-27 | $7700.00 | Window Closed / Lapsed |