US3493831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brushless d.c. motor including starting means
Assignee: Unisys Corp
•
Filing: 1967-05-01
•
Granted: 1970-02-03
•
Expires: 1987-05-01
Abstract
No abstract record available.
Inventors
- 👤 Arthur Stanley Roberts Sr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:28
CPC Classifications
H; H02; H02K; H02K29/00; H02K29/06; H02K29/10; H02P; H02P6/00; H02P6/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2250395A
Cited
US1976880A
Cited
US2227894A
Cited
US3032670A
Cited
US3164734A
Cited
US3264538A
Cited
US3359474A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-02 | 1973-08-04 | 1974-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-02 | 1977-08-04 | 1978-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-02 | 1981-08-04 | 1982-02-03 | $7700.00 | Window Closed / Lapsed |