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Patent US3499225A successfully refreshed from Google Patents.
US3499225A
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Magnetically attached ironworker tool
Assignee: PERCY A DARRAH
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Filing: 1969-03-10
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Granted: 1970-03-10
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Expires: 1989-03-10
Abstract
No abstract record available.
Inventors
- 👤 Percy A Darrah
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:34
CPC Classifications
G; G01; G01C; G01C9/00; G01C9/18; G01C9/24; G01C9/26; G01C9/28; H; H01; H01F; H01F7/00; H01F7/02; H01F7/0231; H01F7/0252
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2535791A
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US2568575A
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Cited
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US2704890A
Cited
US2797486A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-09 | 1973-09-08 | 1974-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-09 | 1977-09-08 | 1978-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-09 | 1981-09-08 | 1982-03-10 | $7700.00 | Window Closed / Lapsed |