US2097146A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical power regulating apparatus
Assignee: AT&T Inc
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Filing: 1936-02-01
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Granted: 1937-10-26
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Expires: 1956-02-01
Abstract
No abstract record available.
Inventors
- 👤 Lange Owen E De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:54
CPC Classifications
H; H03; H03L; H03L5/00; H03L5/02; G; G01; G01R; G01R13/00
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) | 1940-10-25 | 1941-04-26 | 1941-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-10-25 | 1945-04-26 | 1945-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-10-25 | 1949-04-26 | 1949-10-26 | $7700.00 | Window Closed / Lapsed |