US2227353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voltage regulation
Assignee: Hartford National Bank and Trust Co
•
Filing: 1939-01-14
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Granted: 1940-12-31
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Expires: 1959-01-14
Abstract
No abstract record available.
Inventors
- 👤 Kuntke Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:06
CPC Classifications
H; H05; H05G; H05G1/00; H05G1/08; H05G1/10; H05G1/22; H05G1/24
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) | 1943-12-31 | 1944-07-01 | 1944-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-12-31 | 1948-07-01 | 1948-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-12-31 | 1952-07-01 | 1952-12-31 | $7700.00 | Window Closed / Lapsed |