US3390316A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulse speed regulator for an electric motor
Assignee: PRESNA MECHANIKA NARODNY PODNIK
•
Filing: 1965-11-22
•
Granted: 1968-06-25
•
Expires: 1985-11-22
Abstract
No abstract record available.
Inventors
- 👤 Vichr Radek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:50
CPC Classifications
H; H02; H02P; H02P7/00; H02P7/06; H02P7/063; Y; Y10; Y10S; Y10S388/00; Y10S388/923; Y10S388/924; Y10S388/926
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US3143695A
Cited
US3184671A
Cited
US3242409A
Cited
US3238434A
Cited
US3317807A
Cited
US3311804A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-25 | 1971-12-25 | 1972-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-25 | 1975-12-25 | 1976-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-25 | 1979-12-25 | 1980-06-25 | $7700.00 | Window Closed / Lapsed |