US2418460A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resistor
Assignee: AT&T Inc
•
Filing: 1943-12-31
•
Granted: 1947-04-08
•
Expires: 1963-12-31
Abstract
No abstract record available.
Inventors
- 👤 Buchler Ernest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:29
CPC Classifications
H; H01; H01C; H01C1/00; H01C1/14; H01C1/142; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49099; Y10T29/49101; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12611; Y10T428/12639; Y10T428/12646; Y10T428/12771; Y10T428/12861; Y10T428/12868; Y10T428/12875; Y10T428/12896
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1978323A
Cited
US2063826A
Cited
US2070321A
Cited
US2020810A
Cited
US2129947A
Cited
US2213067A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-04-07 | 1950-10-07 | 1951-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-04-07 | 1954-10-07 | 1955-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-04-07 | 1958-10-07 | 1959-04-08 | $7700.00 | Window Closed / Lapsed |