US3585735A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic tracing box
Assignee: Individual
•
Filing: 1968-08-27
•
Granted: 1971-06-22
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Expires: 1988-08-27
Abstract
Abstract A TRACING BOX HAVING ATRANSPARENT SURFACE, PULVERULENT MATERIAL ADAPTED TO ADHERE TO THE SURFACE OF HE BOX WHEN THE BOX IS TURNED UPSIDE DOWN AND MAGNETICALLY ATTRACTIVE MEANS WITHIN THE BOX OPERATED BY A MAGNET FROM WITHOUT THE BOX WHEREBY THE MAGNETICALLY ATTRACTIVE MEANS REMOVES FROM ITS PATH THE PULVERULENTMATERIAL ADHERING TO THE SURFACE OF THE BOX TO FORM LINES WHICH ARE VISIBLE FROM THE OUTSIDE OF THE BOX AND WHICH MAY BE WIPED OUT BY SKAKING THE BOX UPSIDE DOWN.
Inventors
- 👤 Sidney Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:35
CPC Classifications
B; B43; B43L; B43L1/00; B43L1/008
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) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |