Patent US1231628A successfully refreshed from Google Patents.
US1231628A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Potential-regulator.
Assignee: Westinghouse Electric Corp
•
Filing: 1915-05-03
•
Granted: 1917-07-03
•
Expires: 1935-05-03
Abstract
No abstract record available.
Inventors
- 👤 Edwin Lehr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:57
CPC Classifications
H; H02; H02M; H02M3/00; H02M3/02; H02M3/04; H02M3/10; H02M3/145; H02M3/155; H02M3/156; H02M3/158; H02M3/1582; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87169; Y10T137/87217
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) | 1920-07-02 | 1921-01-01 | 1921-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1924-07-02 | 1925-01-01 | 1925-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1928-07-02 | 1929-01-01 | 1929-07-03 | $7700.00 | Window Closed / Lapsed |