US3541841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic loading device
Assignee: Yawata Seitetsu KK
•
Filing: 1968-12-06
•
Granted: 1970-11-24
•
Expires: 1988-12-06
Abstract
No abstract record available.
Inventors
- 👤 Tadami Taoka
- 👤 Tetuya Sugai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:34
CPC Classifications
H; H01; H01F; H01F7/00; H01F7/06; H01F7/08; H01F7/16; H01F7/1638
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1767725A
Cited
CH329426A
Cited
US3127766A
Cited
US3241006A
Cited
US3312842A
Cited
FR1493057A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-23 | 1974-05-25 | 1974-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-23 | 1978-05-25 | 1978-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-23 | 1982-05-25 | 1982-11-24 | $7700.00 | Window Closed / Lapsed |