US2820848A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-party line individual metering
Assignee: TDK Micronas GmbH
•
Filing: 1953-03-12
•
Granted: 1958-01-21
•
Expires: 1973-03-12
Abstract
No abstract record available.
Inventors
- 👤 Horwitz Henry Leopold
- 👤 Hasser George Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:18
CPC Classifications
H; H04; H04M; H04M15/00; H04M15/10; H04Q; H04Q5/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-20 | 1961-07-22 | 1962-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-20 | 1965-07-22 | 1966-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-20 | 1969-07-22 | 1970-01-21 | $7700.00 | Window Closed / Lapsed |