Patent US3228133A successfully refreshed from Google Patents.
US3228133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Permanent magnet display board
Assignee: Max Baermann GmbH
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Filing: 1965-03-02
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Granted: 1966-01-11
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Expires: 1985-03-02
Abstract
No abstract record available.
Inventors
- 👤 Baermann Max
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:53
CPC Classifications
G; G09; G09F; G09F7/00; G09F7/02; G09F7/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A VISUAL DISPLAY BOARD COMPRISING A LAYER HAVING A LARGE AREA, SUBSTANTIALLY FLAT MOUNTING SURFACE FACING OUTWARDLY FROM SAID LAYER, A PLURALITY OF PARALLEL EQUALLY SPACED, FERRO-MAGNETIC POLE PIECES EXTENDING ALONG SAID MOUNTING SURFACE, SAID LAYER INCLUDING NON-MAGNETIC PORTIONS BETWEEN SAID POLE PIECES, A PLURALITY OF EQUIHEIGHT SYMBOLS TO BE MOUNTED IN A STRAIGHT LINE ON SAID MOUNTING SURFACE, SAID SYMBOLS EACH HAVING A PERMANENT MAGNETIC ATTACHING SURFACE, A PLURALITY OF PARALLEL EQUALLY SPACED, MAGNETIC POLES EXTENDING ALONG SAID ATTACHING SURFACE, SAID MAGNETIC POLES ON SAID ATTACHING SURFACE EXTENDING SUBSTANTIALLY HORIZONTAL OF SAID SYMBOLS AND SPACED THE SAME AS SAID POLE PIECES ON SAID MOUNTING SURFACE.
Claim 2
Dependent Claim
106 words
A VISUAL DISPLAY BOARD COMPRISING A LAYER HAVING A LARGE AREA, SUBSTANTIALLY FLAT MOUNTING SURFACE FACING OUTWARDLY FROM SAID LAYER, A PLURALITY OF PARALLEL EQUALLY SPACED, FERRO-MAGNETIC POLE PIECES EXTENDING ALONG SAID MOUNTING SURFACE, SAID LAYER INCLUDING NON-MAGNETIC PORTIONS BETWEEN SAID POLE PIECES, A PLURALITY OF EQUIHEIGHT SYMBOLS TO BE MOUNTED IN A STRAIGHT LINE ON SAID MOUNTING SURFACE, SAID SYMBOLS EACH HAVING A PERMANENT MAGNETIC ATTACHING SURFACE, A PLURALITY OF PARALLEL EQUALLY SPACED, MAGNETIC POLES EXTENDING ALONG SAID ATTACHING SURFACE, SAID MAGNETIC POLES ON SAID ATTACHING SURFACE EXTENDING SUBSTANTIALLY HORIZONTAL OF SAID SYMBOLS AND SPACED THE SAME AS SAID POLE PIECES ON SAID MOUNTING SURFACE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |