US3093919A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic display arrangement
Assignee: Individual
•
Filing: 1958-11-06
•
Granted: 1963-06-18
•
Expires: 1978-11-06
Abstract
No abstract record available.
Inventors
- 👤 Hermann J Holtz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:12
CPC Classifications
G; G09; G09F; G09F7/00; G09F7/02; G09F7/04; Y; Y10; Y10S; Y10S33/00; Y10S33/01; Y10S428/00; Y10S428/90; Y10S52/00; Y10S52/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
88 words
A DISPLAY DEVICE COMPRISING IN COMBINATION, A THIN PERMANENTLY MAGNETIC BASE HAVING A SMOOTH, CONTINUOUS MOUNTING SURFACE AND FORMED FROM FINELY DIVIDED PERMANENTLY MAGNETIC PARTICLES DISPERSED THROUGHOUT AND IMBEDDED WITHIN A NON-MAGNETIC BINDER, SAID BASE BEING MAGNETIZED TO HAVE A UNIFORM MAGNETIC POWER FIELD AND ADAPTED TO HOLD THIN FERRO-MAGNETIC FOIL; A DISPLAY LAYER COEXTENSIVE WITH SAID MOUNTING SURFACE AND MEANS FOR SECURING SAID LAYER ONTO SAID MOUNTING SURFACE; A SYMBOL; AND A THIN FERRO-MAGNETIC LAYER HAVING A COATING OF PRESSURE SENSITIVE ADHESIVE, SAID ADHESIVE SECURING SAID FERRO-
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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) | 1966-06-17 | 1966-12-17 | 1967-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-17 | 1970-12-17 | 1971-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-17 | 1974-12-17 | 1975-06-18 | $7700.00 | Window Closed / Lapsed |