US3440384A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic unit
Assignee: Individual
•
Filing: 1965-10-23
•
Granted: 1969-04-22
•
Expires: 1985-10-23
Abstract
No abstract record available.
Inventors
- 👤 Charles F Schroeder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:11
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/10; H05B6/105; H05B6/108; H05B6/06; H05B6/062; H05B2206/00; H05B2206/02; H05B2206/024
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US607093A
Cited
US891657A
Cited
US1052119A
Cited
US1991248A
Cited
US2338236A
Cited
US2673921A
Cited
US2879366A
Cited
US2873343A
Cited
US2971077A
Cited
US3219800A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-21 | 1972-10-21 | 1973-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-21 | 1976-10-21 | 1977-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-21 | 1980-10-21 | 1981-04-22 | $7700.00 | Window Closed / Lapsed |