US2088604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for controlling and utilizing magnetic fields of force
Assignee: Individual
•
Filing: 1930-05-27
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Granted: 1937-08-03
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Expires: 1950-05-27
Abstract
No abstract record available.
Inventors
- 👤 Littlefield Edgar Earle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:21
CPC Classifications
F; F02; F02M; F02M35/00; F02M35/10; F02M35/10242; F02M35/10262; F02M27/00; F02M27/04; F02M35/10268; F24; F24H; F24H1/00; F24H1/10; H; H05; H05B; H05B6/00; H05B6/02; H05B6/10; H05B6/105; H05B6/108; H05B6/109; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1940-08-02 | 1941-02-01 | 1941-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-08-02 | 1945-02-01 | 1945-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-08-02 | 1949-02-01 | 1949-08-03 | $7700.00 | Window Closed / Lapsed |