US2186182A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency measuring device
Assignee: RCA Corp
•
Filing: 1938-01-08
•
Granted: 1940-01-09
•
Expires: 1958-01-08
Abstract
No abstract record available.
Inventors
- 👤 Arthur C Stocker
- 👤 Harold J Schrader
- 👤 Ben W Robins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:55
CPC Classifications
H; H03; H03J; H03J3/00; H03J3/24; G; G01; G01R; G01R23/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1943-01-08 | 1943-07-10 | 1944-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-01-08 | 1947-07-10 | 1948-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-01-08 | 1951-07-10 | 1952-01-09 | $7700.00 | Window Closed / Lapsed |