US2480130A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low impedance switch circuit
Assignee: Federal Telecommunication Laboratories Inc
•
Filing: 1946-04-06
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Granted: 1949-08-30
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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 05:46
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
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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 |