US2537188A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic telephone station selector set for transmitting station numbers
Assignee: Individual
•
Filing: 1949-04-16
•
Granted: 1951-01-09
•
Expires: 1969-04-16
Abstract
No abstract record available.
Inventors
- 👤 Kaelin Pierre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:28
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/26; H04M1/27; H04M1/272
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1332961A
Cited
US1709031A
Cited
US1972289A
Cited
US1960129A
Cited
FR733549A
Cited
US2165063A
Cited
US2085884A
Cited
US2323019A
Cited
US2333195A
Cited
US2314801A
Cited
US2402341A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-08 | 1954-07-10 | 1955-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-08 | 1958-07-10 | 1959-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-08 | 1962-07-10 | 1963-01-09 | $7700.00 | Window Closed / Lapsed |