US2836479A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical recording apparatus
Assignee: Individual
•
Filing: 1952-07-16
•
Granted: 1958-05-27
•
Expires: 1972-07-16
Abstract
No abstract record available.
Inventors
- 👤 Traub Eberhardt
- 👤 Ortlieb Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:37
CPC Classifications
G; G01; G01D; G01D15/00; G01D15/06; G03; G03G; G03G17/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US912181A
Cited
GB191217388A
Cited
US1651074A
Cited
US2250102A
Cited
US2435441A
Cited
FR904381A
Cited
US2443647A
Cited
US2457131A
Cited
US2547074A
Cited
US2569414A
Cited
US2572668A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-26 | 1961-11-25 | 1962-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-26 | 1965-11-25 | 1966-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-26 | 1969-11-25 | 1970-05-27 | $7700.00 | Window Closed / Lapsed |