Patent US2487191A successfully refreshed from Google Patents.
US2487191A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Double diode variable frequency divider
Assignee: Lanteris Space LLC
•
Filing: 1945-01-24
•
Granted: 1949-11-08
•
Expires: 1965-01-24
Abstract
No abstract record available.
Inventors
- 👤 Jr Newland F Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:49
CPC Classifications
H; H03; H03K; H03K25/00; G; G01; G01S; G01S1/00; G01S1/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2016147A
Cited
US2113011A
Cited
US2258943A
Cited
US2260933A
Cited
US2306386A
Cited
US2420516A
Cited
US2432158A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-07 | 1953-05-09 | 1953-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-07 | 1957-05-09 | 1957-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-07 | 1961-05-09 | 1961-11-08 | $7700.00 | Window Closed / Lapsed |