US3745672A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Colorless painting apparatus
Assignee: Individual
•
Filing: 1972-01-21
•
Granted: 1973-07-17
•
Expires: 1992-01-21
Abstract
Abstract Colorless painting apparatus having chemically treated sheets which are provided with an absorbent color-forming reactant, and a supply of colorless paints each of which chemically reacts with the absorbent color-forming reactant of each treated sheet for imparting different colored illustrations upon the sheet.
Inventors
- 👤 R Duskin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:13
CPC Classifications
G; G09; G09B; G09B11/00; G09B11/10
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
156 words
Colorless painting apparatus comprising at least one chemically treated sheet having an absorbent color-forming reactant, a supply of colorless paints each of which chemically reacts with said absorbent color-forming reactant of said treated sheet, one colorless paint being provided with a chemical composition differing from a chemical composition of another colorless paint to produce different visible colors respectively on said treated sheet when said colorless paints are applied thereto, said treated sheet including means thereon operatively associated with said colorless paints for defining isolated visible zones of preselected configuration in which one or a plurality of said colorless paints is applicable; said treated sheet, thereby, adapted for being selectively imparted with one or a plurality of differently colored zone configurations, said colorless paints including an evaporative chemical agent which retards color appearance on said treated sheet until said chemical agent evaporates from the surface of said treated sheet, thereby, simulating magically a delayed formation of colors.
Claim 2
Dependent Claim
30 words
Colorless painting apparatus as claimed in claim 2 including a plurality of chemically treated sheets each of which includes different illustrations which constitute said isolated visible zones of preselected configuration.
Claim 3
Dependent Claim
16 words
Colorless painting apparatus as claimed in claim 3 wherein said sheets are bound as a book.
Claim 4
Dependent Claim
15 words
Colorless painting apparatus as claimed in claim 2 wherein said colorless paints have respective applicators.
Claim 5
Dependent Claim
16 words
Colorless painting apparatus as claimed in claim 5 wherein each applicator includes a capillary-action felt writing-nib.
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) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |