US2655557A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for use in telephone or like communication systems
Assignee: Individual
•
Filing: 1948-11-30
•
Granted: 1953-10-13
•
Expires: 1968-11-30
Abstract
No abstract record available.
Inventors
- 👤 Stanbury Keith Simmons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:40
CPC Classifications
H; H04; H04M; H04M9/00; H04M9/001
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2071053A
Cited
FR812019A
Cited
US2164185A
Cited
US2199220A
Cited
US2341539A
Cited
US2336888A
Cited
US2369351A
Cited
US2516776A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-12 | 1957-04-13 | 1957-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-12 | 1961-04-13 | 1961-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-12 | 1965-04-13 | 1965-10-13 | $7700.00 | Window Closed / Lapsed |