Patent US2434698A successfully refreshed from Google Patents.
US2434698A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Time division multiplex telephone system
Assignee: Individual
•
Filing: 1944-02-15
•
Granted: 1948-01-20
•
Expires: 1964-02-15
Abstract
No abstract record available.
Inventors
- 👤 John H Homrighous
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:32
CPC Classifications
H; H04; H04M; H04M7/00; H04M7/08
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1325574A
Cited
US1337676A
Cited
US1472451A
Cited
US1624596A
Cited
US1567231A
Cited
US1573983A
Cited
US1655520A
Cited
US1809070A
Cited
US1941618A
Cited
US2031696A
Cited
US2048081A
Cited
US2105016A
Cited
US2170751A
Cited
US2277516A
Cited
US2263369A
Cited
US2351621A
Cited
US2337878A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-01-19 | 1951-07-21 | 1952-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-01-19 | 1955-07-21 | 1956-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-01-19 | 1959-07-21 | 1960-01-20 | $7700.00 | Window Closed / Lapsed |