US3435312A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Linear motor control system
Assignee: Douk's Experiment
•
Filing: 1966-02-14
•
Granted: 1969-03-25
•
Expires: 1986-02-14
Abstract
No abstract record available.
Inventors
- 👤 Frank A De Coster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:07
CPC Classifications
H; H02; H02K; H02K41/00; H02K41/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3118383A
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US3179867A
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US2150440A
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US2922175A
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US2892140A
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US2958025A
Cited
US3147419A
Cited
US3215916A
Cited
US3345546A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-24 | 1972-09-23 | 1973-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-24 | 1976-09-23 | 1977-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-24 | 1980-09-23 | 1981-03-25 | $7700.00 | Window Closed / Lapsed |