US3021789A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor speed control arrangement
Assignee: Individual
•
Filing: 1958-08-25
•
Granted: 1962-02-20
•
Expires: 1978-08-25
Abstract
No abstract record available.
Inventors
- 👤 Carl E Ryden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:56
CPC Classifications
F; F04; F04D; F04D15/00; F04D15/0066; G; G05; G05D; G05D9/00; G05D9/12; Y; Y10; Y10S; Y10S388/00; Y10S388/923; Y10S388/929
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2735057A
Cited
US2734458A
Cited
US1664250A
Cited
US1757339A
Cited
US2219147A
Cited
US2246295A
Cited
US2548745A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-19 | 1965-08-21 | 1966-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-19 | 1969-08-21 | 1970-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-19 | 1973-08-21 | 1974-02-20 | $7700.00 | Window Closed / Lapsed |