Patent US3407757A successfully refreshed from Google Patents.
Patent US1479836A successfully refreshed from Google Patents.
US1479836A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric motor control
Assignee: Vanadium Corp of America
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Filing: 1919-04-24
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Granted: 1924-01-08
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Expires: 1939-04-24
Abstract
No abstract record available.
Inventors
- 👤 Byramji D Saklatwalla
- 👤 Arthur N Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:10
CPC Classifications
H; H05; H05B; H05B7/00; H05B7/02; H05B7/144; H05B7/148; H05B7/152; Y; Y02; Y02P; Y02P10/00; Y02P10/25
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) | 1927-01-07 | 1927-07-09 | 1928-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1931-01-07 | 1931-07-09 | 1932-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1935-01-07 | 1935-07-09 | 1936-01-08 | $7700.00 | Window Closed / Lapsed |