US2486587A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure measuring apparatus
Assignee: Individual
•
Filing: 1944-08-16
•
Granted: 1949-11-01
•
Expires: 1964-08-16
Abstract
No abstract record available.
Inventors
- 👤 Jr John T Callahan
- 👤 Donald O Kocmich
- 👤 Paul F Adair
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:01
CPC Classifications
G; G01; G01L; G01L13/00; G01L13/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US764572A
Cited
US1191416A
Cited
US1416210A
Cited
US1494586A
Cited
US1573850A
Cited
US1682602A
Cited
GB248384A
Cited
US1822184A
Cited
US1822075A
Cited
US2151941A
Cited
GB454443A
Cited
US2112682A
Cited
US2223712A
Cited
US2343181A
Cited
US2371040A
Cited
US2398470A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-10-31 | 1953-05-02 | 1953-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-10-31 | 1957-05-02 | 1957-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-10-31 | 1961-05-02 | 1961-11-01 | $7700.00 | Window Closed / Lapsed |