Patent US2700069A successfully refreshed from Google Patents.
US2700069A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Measured service telephone system
Assignee: Stromberg Carlson Corp
•
Filing: 1950-03-11
•
Granted: 1955-01-18
•
Expires: 1970-03-11
Abstract
No abstract record available.
Inventors
- 👤 William W Pharis
- 👤 Leon H Reagan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:07
CPC Classifications
H; H04; H04M; H04M17/00; H04M17/02; H04M17/023
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1792651A
Cited
US1792452A
Cited
US1823679A
Cited
US1904252A
Cited
US2226731A
Cited
US2385720A
Cited
US2332872A
Cited
US2471087A
Cited
US2615092A
Cited
US2483206A
Cited
US2558571A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-01-17 | 1958-07-19 | 1959-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-17 | 1962-07-19 | 1963-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-17 | 1966-07-19 | 1967-01-18 | $7700.00 | Window Closed / Lapsed |