US2433295A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Loud-speaker telephone set
Assignee: Automatic Electric Laboratories Inc
•
Filing: 1944-11-10
•
Granted: 1947-12-23
•
Expires: 1964-11-10
Abstract
No abstract record available.
Inventors
- 👤 Theodore C Riebe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:09
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/60; H04M1/62
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1568589A
Cited
US1917724A
Cited
US2017358A
Cited
US2008287A
Cited
US2101009A
Cited
US2214992A
Cited
US2193536A
Cited
US2226734A
Cited
US2319409A
Cited
US2634771A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-12-22 | 1951-06-23 | 1951-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-12-22 | 1955-06-23 | 1955-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-12-22 | 1959-06-23 | 1959-12-23 | $7700.00 | Window Closed / Lapsed |