Patent US4016309A successfully refreshed from Google Patents.
US4016309A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for treating printed paper sheets for illuminated display
Assignee: First-Sha Co Ltd
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Filing: 1975-12-15
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Granted: 1977-04-05
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Expires: 1995-12-15
Abstract
Abstract There is described a method for treating a paper sheet which bears on one side a printed picture image for illuminated display on a light box, wherein a treating liquid is applied on the non-printed back side of the paper sheet to impregnate liquid paraffin into the sheet to increase its light transmittivity and the sharpness of the picture image.
Inventors
- 👤 Hirokazu Itoh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:02
CPC Classifications
G; G09; G09F; G09F13/00; G09F13/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
A method for displaying light posters, comprising the steps of applying a treating liquid containing 60.0% to 80.0% by weight of liquid parafin, 0.03% to 0.05% by weight of butyl hydroxyanisole and a balance of a diluent for impregnation on back sides of light posters with the same picture images, at an ambient temperature within the range of 5° C to 30° C and at a humidity below 75%, drying said light posters, superposing said posters one on the other, placing said posters on a translucent milky white resin plate, mounting said plate with said posters thereon at the open end of a light box, covering the outer side of said plate with a superposed sheet with a transparent polyvinyl chloride, and, fastening said covering resin sheet with a number of L-shaped frame members.
Claim 2
Independent Claim
134 words
A method for displaying light posters, comprising the steps of applying a treating liquid containing 60.0% to 80.0% by weight of liquid parafin, 0.03% to 0.05% by weight of butyl hydroxyanisole and a balance of a diluent for impregnation on back sides of light posters with the same picture images, at an ambient temperature within the range of 5° C to 30° C and at a humidity below 75%, drying said light posters, superposing said posters one on the other, placing said posters on a translucent milky white resin plate, mounting said plate with said posters thereon at the open end of a light box, covering the outer side of said plate with a superposed sheet with a transparent polyvinyl chloride, and, fastening said covering resin sheet with a number of L-shaped frame members.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-04-04 | 1980-10-04 | 1981-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-04 | 1984-10-04 | 1985-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-04 | 1988-10-04 | 1989-04-05 | $7700.00 | Window Closed / Lapsed |