Patent US443122A successfully refreshed from Google Patents.
Patent US1973279A successfully refreshed from Google Patents.
US1973279A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical measuring and regulating system
Assignee: Westinghouse Electric Corp
•
Filing: 1933-04-22
•
Granted: 1934-09-11
•
Expires: 1953-04-22
Abstract
No abstract record available.
Inventors
- 👤 Henry L Bernarde
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:00
CPC Classifications
G; G05; G05D; G05D3/00; G05D3/12; G05D3/14; G05B; G05B1/00; G05B1/01; G05B1/04; H; H03; H03F; H03F3/00; H03F3/38
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1937-09-10 | 1938-03-12 | 1938-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-09-10 | 1942-03-12 | 1942-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-09-10 | 1946-03-12 | 1946-09-11 | $7700.00 | Window Closed / Lapsed |