US2650950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telephone line lockout adapter
Assignee: Stromberg Carlson Corp
•
Filing: 1948-05-26
•
Granted: 1953-09-01
•
Expires: 1968-05-26
Abstract
No abstract record available.
Inventors
- 👤 Kessler Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:17
CPC Classifications
H; H04; H04Q; H04Q3/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1871300A
Cited
US1941085A
Cited
US2170403A
Cited
US2183656A
Cited
US2183649A
Cited
US2300037A
Cited
US2572027A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-31 | 1957-03-02 | 1957-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-31 | 1961-03-02 | 1961-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-31 | 1965-03-02 | 1965-09-01 | $7700.00 | Window Closed / Lapsed |