Patent US2895739A successfully refreshed from Google Patents.
US2424622A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Timing device for recorders
Assignee: ExxonMobil Oil Corp
•
Filing: 1945-01-15
•
Granted: 1947-07-29
•
Expires: 1965-01-15
Abstract
No abstract record available.
Inventors
- 👤 Carroll D Mcclure
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:36
CPC Classifications
G; G01; G01R; G01R13/00; G01R13/20; G01R13/22; G01R13/30
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2297251A
Cited
US2277521A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-07-28 | 1951-01-27 | 1951-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-07-28 | 1955-01-27 | 1955-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-07-28 | 1959-01-27 | 1959-07-29 | $7700.00 | Window Closed / Lapsed |