US3419782A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Direct current commutation system for brushless electrical motors
Assignee: Motors Liquidation Co
•
Filing: 1965-09-20
•
Granted: 1968-12-31
•
Expires: 1985-09-20
Abstract
No abstract record available.
Inventors
- 👤 Leonard J Sheldrake
- 👤 Jerrold L Mullen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:55
CPC Classifications
H; H02; H02K; H02K29/00; H02K29/06; H02K29/12; H02P; H02P6/00; H02P6/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3213287A
Cited
US3207974A
Cited
US3262036A
Cited
US3321697A
Cited
US3219905A
Cited
US3340453A
Cited
US3355654A
Cited
US3354370A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-31 | 1972-07-01 | 1972-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-31 | 1976-07-01 | 1976-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-31 | 1980-07-01 | 1980-12-31 | $7700.00 | Window Closed / Lapsed |