US2408878A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Communication system
Assignee: SPX Technologies Inc
•
Filing: 1945-02-28
•
Granted: 1946-10-08
•
Expires: 1965-02-28
Abstract
No abstract record available.
Inventors
- 👤 Neil D Preston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 02:44
CPC Classifications
H; H04; H04B; H04B5/00; B; B61; B61L; B61L27/00; B61L27/50; B61L27/57
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) | 1949-10-07 | 1950-04-08 | 1950-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-10-07 | 1954-04-08 | 1954-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-10-07 | 1958-04-08 | 1958-10-08 | $7700.00 | Window Closed / Lapsed |