Patent US3553870A successfully refreshed from Google Patents.
US3553870A
Expired / Lapsed
US
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Illuminated display characters
Assignee: SNAPLITE DISPLAYS Inc
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Filing: 1968-03-25
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Granted: 1971-01-12
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Expires: 1988-03-25
Abstract
Abstract AN ILLUMINATED DISPLAY CHARACTER FOR A SIGN IS FORMED WITH A RECTANGULAR TRANSLUCENT COVER DETACHABLY SECURED TO A SIMILARLY SHAPED BODY UNIT AND OVERLYING AN ELECTRIC LAMP WHICH IS HOUSED WITHIN THE BODY UNIT TO ILLUMINATE THE CHARACTER. PART OF THE COVER IS DARKENED WITH OPAQUE MATERIAL ARRANGED TO OUTLINE AN INTELLIGIBLE TRANSLUCENT LETTER OR NUMBER LOCATED CENTRALLY OF THE FACE AND ILLUMINATED BY THE LAMP. BY REPLACING ONE COVER ON THE BODY UNIT WITH ANOTHER OF THE SAME SIZE AND SHAPE AND FORMED WITH A DIFFERENT TRANSLUCENT LETTER OR NUMBER, THE SAME BODY UNIT AND LAMP MAY BE USED TO DISPLAY VARIOUS LETTERS AND NUMBERS.
Inventors
- 👤 Ralph H Rudolph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:22
CPC Classifications
G; G09; G09F; G09F7/00; G09F7/02; G09F7/06; G09F13/00; G09F13/04; G09F13/0404
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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |