Patent US3753718A successfully refreshed from Google Patents.
US3753718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photosensitive medium comprising a cyclic acetal of furfural, a lower haloalkane, and silica
Assignee: Kimberly Clark Tissue Co
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Filing: 1972-02-04
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Granted: 1973-08-21
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Expires: 1992-02-04
Abstract
Abstract Improved, negative-working, copying materials are prepared by coating a paper or film substrate with an amine-free formulation comprising a cyclic acetal of furfural, a photosensitive lower haloalkane, a binder resin and silica. Images are formed on the copying materials by exposure to ultraviolet light and fixed by heating.
Inventors
- 👤 W Lonczak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:31
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/675
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
27 words
A coating composition, as claimed in claim 1, in which the amount of silica is equal to up to about 5.0 percent by weight of the composition.
Claim 2
Dependent Claim
18 words
A coating composition, as claimed in claim 1, in which the cyclic acetal of furfural is difurfurylidene pentaerythritol.
Claim 3
Dependent Claim
16 words
A coating composition, as claimed in claim 1, in which the photosensitive lower haloalkane is iodoform.
Claim 4
Dependent Claim
19 words
A coating composition, as claimed in claim 1, in which the binder resin is a homopolymer of polyvinyl chloride.
Claim 5
Dependent Claim
43 words
In a negative-working copying material comprising a paper or film substrate having coated on one surface thereof an amine-free layer comprising a cyclic acetal of furfural, a photo-sensitive lower haloalkane and a binder resin, the improvement which comprises including silica in said layer.
Claim 6
Dependent Claim
18 words
A copying material, as claimed in claim 6, in which the cyclic acetal of furfural is difurfurylidene pentaerythritol.
Claim 7
Dependent Claim
16 words
A copying material, as claimed in claim 6, in which the photosensitive lower haloalkane is iodoform.
Claim 8
Dependent Claim
19 words
A copying material, as claimed in claim 6, in which the binder resin is a homopolymer of polyvinyl chloride.
References Cited (Backward Citations)
US1587269A
Cited
US3394395A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |