US3769019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light and heat sensitive sheet material
Assignee: 3M Co
•
Filing: 1968-05-29
•
Granted: 1973-10-30
•
Expires: 1988-05-29
Abstract
Abstract Photosensitive sheet material is described which produces sharply defined dense images on a transparent background simply by exposure to a light-image followed by heating.
Inventors
- 👤 J Wiese
- 👤 Dyke Tiers G Van
- 👤 G Rathmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:22
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/494; G03C1/498; G03C1/49836; G03C1/49845; G03C1/49854; G03C1/76; G03C1/825; G03C1/83
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
13 words
Sheet material of claim 1 wherein said light-sensitive image-forming layer comprises silver halide.
Claim 2
Dependent Claim
12 words
Sheet material of claim 2 wherein said light-sensitive image-forming layer is heat-developable.
Claim 3
Dependent Claim
26 words
Sheet material of claim 3 wherein said light-sensitive image-forming layer includes a major proportion of organic silver salt oxidizing agent and reducing agent for silver ion.
Claim 4
Dependent Claim
23 words
Sheet material of claim 3 wherein said antihalation layer is heat-bleachable under the same time-temperature conditions required to heat-develop said light-sensitive image-forming layer.
Claim 5
Dependent Claim
18 words
Sheet material of claim 2 wherein said antihalation layer and said light-sensitive image-forming layer are in face-to-face contact.
Claim 6
Dependent Claim
19 words
Sheet material of claim 2 wherein said support member lies between said antihalation layer and said light-sensitive image-forming layer.
Claim 7
Dependent Claim
15 words
Sheet material of claim 2 wherein said color layer is included in said support member.
Claim 8
Dependent Claim
13 words
Sheet material of claim 4 wherein said antihalation layer comprises an organic dye.
Claim 9
Dependent Claim
36 words
Sheet material of claim 9 wherein said antihalation layer loses its light-absorptivity when heated under the same time-temperature conditions required to develop a visible image in the light-sensitive image-forming layer after exposure to a said light-image.
Claim 10
Dependent Claim
39 words
Sheet material of claim 1 wherein said transparent light-sensitive image-forming layer comprises photosensitive silver halide and said colored light-absorptive antihalation layer comprises a colored organic dye which is decolorizable by decomposition with removal of an acidic component on heating.
References Cited (Backward Citations)
US2770534A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |