Patent US2480130A successfully refreshed from Google Patents.
US2480130A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low impedance switch circuit
Assignee: Federal Telecommunication Laboratories Inc
•
Filing: 1946-04-06
•
Granted: 1949-08-30
•
Expires: 1966-04-06
Abstract
No abstract record available.
Inventors
- 👤 Donald D Grieg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:34
CPC Classifications
E; E04; E04B; E04B2/00; E04B2/02; E04B2/14; E04B2/22; H; H03; H03K; H03K17/00; H03K17/51; H03K17/88; H04; H04J; H04J3/00; H04J3/02; H04J3/04; H04J3/045; H04Q; H04Q3/00; H04Q3/42; H04Q3/52; H04Q3/525; E04B2002/0202; E04B2002/0204; E04B2002/0206; E04B2002/0226
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2097392A
Cited
US2243158A
Cited
US2311021A
Cited
US2212645A
Cited
US2173193A
Cited
US2185693A
Cited
US2250527A
Cited
US2250528A
Cited
US2224677A
Cited
US2223001A
Cited
US2310883A
Cited
US2267557A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-08-29 | 1953-02-28 | 1953-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-29 | 1957-02-28 | 1957-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-29 | 1961-02-28 | 1961-08-30 | $7700.00 | Window Closed / Lapsed |