US3588260A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crayon and color media
Assignee: Wall Street Dynamics Inc
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Filing: 1969-05-01
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Granted: 1971-06-28
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Expires: 1989-05-01
Abstract
Abstract A MAKER WHICH IS HARDER THAN MOST HOUSEHOLD OBJECTS, AND HENCE WILL NOT ABRADE TO LEAVE A COLOR MARK. ABRASIVE SURFACE SHARP ENOUGH TO ABRADE THE MARKER. THE SURFACE IS FILLED WITH A WAX WHICH WILL CAUSE PIGMENT ABRADED BY THE SHARP SURFACE TO BE COMPOUNDED THEREIN AS CRAYON COLOR MARKING.
Inventors
- 👤 Shirley A Caywood
- 👤 Clarence L Neuvirth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:43
CPC Classifications
B; B43; B43L; B43L1/00; B43K; B43K19/00; B43L1/04; B43L1/10
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) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |