US2600226A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device to minimize interference between dial impulses in a carrier system
Assignee: Hartford National Bank and Trust Co
•
Filing: 1948-03-10
•
Granted: 1952-06-10
•
Expires: 1968-03-10
Abstract
No abstract record available.
Inventors
- 👤 Ensink Johannes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:49
CPC Classifications
H; H03; H03C; H03C3/00; H03C3/34
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1472821A
Cited
US1773116A
Cited
US2184826A
Cited
GB523066A
Cited
US2210957A
Cited
US2215483A
Cited
US2215482A
Cited
US2231958A
Cited
FR858561A
Cited
US2450352A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-06-10 | 1955-12-10 | 1956-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-10 | 1959-12-10 | 1960-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-10 | 1963-12-10 | 1964-06-10 | $7700.00 | Window Closed / Lapsed |