US2055175A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for electrical uses
Assignee: AT&T Inc
•
Filing: 1934-05-10
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Granted: 1936-09-22
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Expires: 1954-05-10
Abstract
No abstract record available.
Inventors
- 👤 Erwin E Franz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 00:19
CPC Classifications
H; H01; H01F; H01F29/00; H01F29/08; H01F29/10; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49073; Y10T29/49075; Y10T29/49078; Y10T29/49117; Y10T29/49124; Y10T29/49126; Y10T29/53; Y10T29/5313; Y10T29/5317
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1939-09-22 | 1940-03-23 | 1940-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-09-22 | 1944-03-23 | 1944-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-09-22 | 1948-03-23 | 1948-09-22 | $7700.00 | Window Closed / Lapsed |