US2517992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telephone connecting block
Assignee: Kellogg Switchboard and Supply Co
•
Filing: 1946-10-19
•
Granted: 1950-08-08
•
Expires: 1966-10-19
Abstract
No abstract record available.
Inventors
- 👤 Clifford E Erickson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:42
CPC Classifications
H; H02; H02G; H02G3/00; H02G3/02; H02G3/06; H02G3/0616; H02G3/0691; H02G3/0625; H02G3/0683; H02G3/08; H02G3/081; H02G3/083; H02G3/16; H04; H04M; H04M1/00; H04M1/02; H04M1/0293; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1148699A
Cited
GB145356A
Cited
FR564156A
Cited
US1659303A
Cited
DE540780C
Cited
US1915199A
Cited
US2199219A
Cited
US2369380A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-07 | 1954-02-06 | 1954-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-07 | 1958-02-06 | 1958-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-07 | 1962-02-06 | 1962-08-08 | $7700.00 | Window Closed / Lapsed |