Patent US4366239A successfully refreshed from Google Patents.
US4366239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyester base drafting film with nitrocellulose and polymethylmethacrylate layer
Assignee: Fujifilm Holdings Corp
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Filing: 1982-01-15
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Granted: 1982-12-28
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Expires: 2002-01-15
Abstract
Abstract A drafting film comprising a hydrophobic support and a matte layer formed thereon, said matte layer comprising silicon dioxide as a matting agent and a mixture of polymethyl methacrylate or a copolymer thereof and nitrocellulose. The drafting film show excellent adaptability for writing or drawing and revising or erasing. A wash-off type photographic film is also provided by forming a wash-off silver halide photosensitive emulsion layer on the drafting film.
Inventors
- 👤 Yukio Shinagawa
- 👤 Sumio Ohtani
- 👤 Koichi Suematsu
- 👤 Hideo Kawaguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:38
CPC Classifications
B; B44; B44D; B44D3/00; B44D3/18; G; G03; G03C; G03C1/00; G03C1/76; G03C1/95; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31786; Y10T428/3179; Y10T428/31797
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
115 words
A drafting film comprising a hydrophobic polyesterfilm support having formed thereon a matte layer comprising silicon dioxide as a matting agent and a mixture of (i) polymethylmethacrylate or a copolymer thereof having a molecular weight of about 10,000 to about 500,000 and (ii) nitrocellulose wherein the nitrocellulose is used in a mixing ratio of about 5 to 50% by weight based on total weight of the polymethyl methacrylate or a copolymer thereof and the nitrocellulose and the dry coverage of the above components is: matting agent from 1 to 20 g/m 2 , polymethyl methacryalte or a copolymer thereof from 1 to 10 g/m 2 , and nitrocellulose from 0.5 to 10 g/m 2 .
Claim 2
Dependent Claim
115 words
A drafting film comprising a hydrophobic polyesterfilm support having formed thereon a matte layer comprising silicon dioxide as a matting agent and a mixture of (i) polymethylmethacrylate or a copolymer thereof having a molecular weight of about 10,000 to about 500,000 and (ii) nitrocellulose wherein the nitrocellulose is used in a mixing ratio of about 5 to 50% by weight based on total weight of the polymethyl methacrylate or a copolymer thereof and the nitrocellulose and the dry coverage of the above components is: matting agent from 1 to 20 g/m 2 , polymethyl methacryalte or a copolymer thereof from 1 to 10 g/m 2 , and nitrocellulose from 0.5 to 10 g/m 2 .
Claim 3
Dependent Claim
24 words
The drafting film as claimed in claim 1, wherein the copolymer of polymethyl methacrylate is a copolymer of methyl methacrylate and another vinyl compound.
Claim 4
Dependent Claim
38 words
The drafting film as claimed in claim 2, wherein the vinyl compound is methyl acrylate, ethyl acrylate, butyl acrylate, styrene, methylstyrene, chlorostyrene, vinyl acetate, vinyl chloride, vinylidene chloride, acrylic acid, acrylonitrile, glycidyl acrylate, glycidyl methacrylate, or hydroxyethyl acrylate.
Claim 5
Dependent Claim
26 words
A wash-off type photographic material comprising the drafting film of claim 1 as a support having formed thereon at least one silver halide photosensitive emulsion layer.
Claim 6
Dependent Claim
32 words
The wash-off type photographic film as claimed in claim 4, wherein the silver halide photographic emulsion layer or a layer adjacent to the silver halide emulsion layer contains a tanning developing agent.
Claim 7
Dependent Claim
28 words
The wash-off type photographic film as claimed in claim 4, wherein a layer containing carbon black is formed between the support and the silver halide photosensitive emulsion layer.
Claim 8
Dependent Claim
24 words
The drafting film as claimed in claim 1, wherein the molecular weight of the polymethyl methacrylate or a copolymer thereof is 100,000 to 300,000.
Claim 9
Dependent Claim
35 words
The drafting film of claim 7, wherein the mixing ratio of the nitrocellulose is about 10 to 40% by weight based on total weight of the polymethyl methacrylate or a copolymer thereof and the nitrocellulose.
Claim 10
Dependent Claim
48 words
The drafting film as claimed in claim 8, wherein the dry coverage of the component is: matting agent from 3 to 10 g/m 2 , polymethyl methacrylate or a copolymer thereof from 2 to B 5 g/m 2 , and nitrocellulose from 1 to 5 g/m 2 .
Claim 11
Dependent Claim
20 words
The drafting film as claimed in claim 9, wherein the particle size of the matting agent is 0.5 to 10μ.
Claim 12
Dependent Claim
20 words
The drafting film as claimed in claim 10, wherein the particle size of the matting agent is 1 to 5μ.
Claim 13
Dependent Claim
14 words
The drafting film as claimed in claim 1, wherein said support is polyethylene terephthalate.
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) | 1985-12-27 | 1986-06-28 | 1986-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-27 | 1990-06-28 | 1990-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-27 | 1994-06-28 | 1994-12-28 | $7700.00 | Window Closed / Lapsed |