US2121359A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for timing of periodic events
Assignee: RCA Corp
•
Filing: 1937-03-31
•
Granted: 1938-06-21
•
Expires: 1957-03-31
Abstract
No abstract record available.
Inventors
- 👤 David G C Luck
- 👤 Lowell E Norton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:34
CPC Classifications
G; G04; G04F; G04F13/00; G04F13/02; G01; G01R; G01R13/00; G01R13/20; G01R13/208
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) | 1941-06-20 | 1941-12-20 | 1942-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-06-20 | 1945-12-20 | 1946-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-06-20 | 1949-12-20 | 1950-06-21 | $7700.00 | Window Closed / Lapsed |