US2610256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dial set for carrier or 2-wire lines
Assignee: STC PLC
•
Filing: 1949-11-05
•
Granted: 1952-09-09
•
Expires: 1969-11-05
Abstract
No abstract record available.
Inventors
- 👤 Brandt Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:18
CPC Classifications
H; H04; H04Q; H04Q1/00; H04Q1/18; H04Q1/30; H04Q1/44; H04Q1/444; H04Q1/45
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US199007A
Cited
US1688453A
Cited
US2131164A
Cited
US2433281A
Cited
US2438902A
Cited
US2408878A
Cited
US2414795A
Cited
US2454498A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-09-09 | 1956-03-10 | 1956-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-09 | 1960-03-10 | 1960-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-09 | 1964-03-10 | 1964-09-09 | $7700.00 | Window Closed / Lapsed |