US2112264A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrodynamic apparatus
Assignee: FRANK B HOPEWELL
•
Filing: 1931-04-16
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Granted: 1938-03-29
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Expires: 1951-04-16
Abstract
No abstract record available.
Inventors
- 👤 Edward L Bowles
- 👤 Jr Guy Howard Berard Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:24
CPC Classifications
D; D03; D03D; D03D49/00; D03D49/24; D03D49/44; B; B65; B65G; B65G23/00; H; H02; H02K; H02K41/00; H02K41/02; H02K41/025; B65G2811/00; B65G2811/09
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) | 1941-03-28 | 1941-09-27 | 1942-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-03-28 | 1945-09-27 | 1946-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-03-28 | 1949-09-27 | 1950-03-29 | $7700.00 | Window Closed / Lapsed |