US2995656A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transmitters for electromagnetic communication systems
Assignee: Multitone Electric Co Ltd
•
Filing: 1957-12-16
•
Granted: 1961-08-08
•
Expires: 1977-12-16
Abstract
No abstract record available.
Inventors
- 👤 Sneath Oswald Barber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:08
CPC Classifications
H; H04; H04Q; H04Q3/00; H04M; H04M1/00; H04M1/26; H04M1/30; H04M1/50
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2122183A
Cited
US2295173A
Cited
US2354148A
Cited
US2522973A
Cited
US2505182A
Cited
US2581159A
Cited
US2806954A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-07 | 1965-02-06 | 1965-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-07 | 1969-02-06 | 1969-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-07 | 1973-02-06 | 1973-08-08 | $7700.00 | Window Closed / Lapsed |