US2440044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for making electricalconductivity tests on tubular articles
Assignee: Flannery Bolt Co
•
Filing: 1943-03-24
•
Granted: 1948-04-20
•
Expires: 1963-03-24
Abstract
No abstract record available.
Inventors
- 👤 Grover R Greenslade
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:45
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/04; G01N27/20
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
DE285536C
Cited
US664144A
Cited
US1104753A
Cited
US1253282A
Cited
US1407693A
Cited
US1525286A
Cited
US1440470A
Cited
US1567728A
Cited
US1895643A
Cited
US2091634A
Cited
US2094234A
Cited
US2220158A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-04-20 | 1951-10-20 | 1952-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-04-20 | 1955-10-20 | 1956-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-04-20 | 1959-10-20 | 1960-04-20 | $7700.00 | Window Closed / Lapsed |