Patent US2864039A successfully refreshed from Google Patents.
US2864039A
Expired / Lapsed
US
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Electromagnetic control device
Assignee: Individual
•
Filing: 1953-12-14
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Granted: 1958-12-09
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Expires: 1973-12-14
Abstract
No abstract record available.
Inventors
- 👤 Russell B Matthews
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:29
CPC Classifications
G; G05; G05D; G05D7/00; G05D7/06; G05D7/0617; G05D7/0629; G05D7/0635
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1672193A
Cited
US1835027A
Cited
US1979127A
Cited
US2216620A
Cited
US2263819A
Cited
US2310138A
Cited
US2569800A
Cited
US2649767A
Cited
US2738450A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-08 | 1962-06-09 | 1962-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-08 | 1966-06-09 | 1966-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-08 | 1970-06-09 | 1970-12-09 | $7700.00 | Window Closed / Lapsed |