US1652504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System of control
Assignee: Westinghouse Electric Corp
•
Filing: 1923-01-30
•
Granted: 1927-12-13
•
Expires: 1943-01-30
Abstract
No abstract record available.
Inventors
- 👤 Walter E Thau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:34
CPC Classifications
B; B63; B63H; B63H23/00; B63H23/22; B63H23/24; B63H21/00; B63H21/12; B63H21/17; B63H21/21; B63H2021/216; B63H5/00; B63H5/07; B63H5/08
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) | 1930-12-12 | 1931-06-13 | 1931-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1934-12-12 | 1935-06-13 | 1935-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1938-12-12 | 1939-06-13 | 1939-12-13 | $7700.00 | Window Closed / Lapsed |