US1696415A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voltage-balance regulator
Assignee: AT&T Inc
•
Filing: 1927-08-09
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Granted: 1928-12-25
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Expires: 1947-08-09
Abstract
No abstract record available.
Inventors
- 👤 Leland C Roberts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:49
CPC Classifications
H; H04; H04L; H04L12/00; H04L12/02; H04L12/10; H01; H01H; H01H47/00; H01H47/02; H01H47/14
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) | 1931-12-25 | 1932-06-25 | 1932-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-12-25 | 1936-06-25 | 1936-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-12-25 | 1940-06-25 | 1940-12-25 | $7700.00 | Window Closed / Lapsed |