Patent US5390611A successfully refreshed from Google Patents.
US923653A
Expired / Lapsed
US
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Air or water blast magnet.
Assignee: Individual
•
Filing: 1906-01-29
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Granted: 1909-06-01
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Expires: 1926-01-29
Abstract
No abstract record available.
Inventors
- 👤 John D Hilliard Jr
- 👤 Charles E Parsons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:31
CPC Classifications
H; H01; H01F; H01F7/00; H01F7/06; H01F7/20; H01F7/206
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) | 1912-05-31 | 1912-11-30 | 1913-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1916-05-31 | 1916-11-30 | 1917-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1920-05-31 | 1920-11-30 | 1921-06-01 | $7700.00 | Window Closed / Lapsed |