Patent US4739985A successfully refreshed from Google Patents.
Patent US2498406A successfully refreshed from Google Patents.
US2498406A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Demonstration device
Assignee: Eagle Picher Co
•
Filing: 1948-03-09
•
Granted: 1950-02-21
•
Expires: 1968-03-09
Abstract
No abstract record available.
Inventors
- 👤 Samuel C Fay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:17
CPC Classifications
G; G09; G09B; G09B23/00; G09B23/06; G09B23/18; G09B23/182
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1921414A
Cited
US2305923A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-20 | 1953-08-22 | 1954-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-20 | 1957-08-22 | 1958-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-20 | 1961-08-22 | 1962-02-21 | $7700.00 | Window Closed / Lapsed |