US2582957A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Communication system
Assignee: Individual
•
Filing: 1945-11-26
•
Granted: 1952-01-22
•
Expires: 1965-11-26
Abstract
No abstract record available.
Inventors
- 👤 Adolph W Borsum
- 👤 Wilhelm W Brockway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:58
CPC Classifications
H; H04; H04L; H04L5/00; H04L5/02; H04L5/12
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2110746A
Cited
US2112824A
Cited
US2256487A
Cited
US2236374A
Cited
US2176120A
Cited
US2233275A
Cited
US2363941A
Cited
US2321971A
Cited
US2402973A
Cited
US2406858A
Cited
US2407336A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-01-21 | 1955-07-23 | 1956-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-21 | 1959-07-23 | 1960-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-21 | 1963-07-23 | 1964-01-22 | $7700.00 | Window Closed / Lapsed |