US2673933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio circuit tuning device
Assignee: DESIGNERS FOR INDUSTRY Inc
•
Filing: 1951-05-31
•
Granted: 1954-03-30
•
Expires: 1971-05-31
Abstract
No abstract record available.
Inventors
- 👤 George E Morton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:19
CPC Classifications
H; H01; H01F; H01F21/00; H01F21/02; H01F21/06; H01F21/065; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20396; Y10T74/20474
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2210303A
Cited
FR780003A
Cited
FR821535A
Cited
US2131976A
Cited
US2259003A
Cited
US2364291A
Cited
GB561787A
Cited
US2502202A
Cited
US2514957A
Cited
US2394391A
Cited
US2398112A
Cited
US2516056A
Cited
US2497662A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-29 | 1957-09-28 | 1958-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-29 | 1961-09-28 | 1962-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-29 | 1965-09-28 | 1966-03-30 | $7700.00 | Window Closed / Lapsed |