Patent US4526847A successfully refreshed from Google Patents.
US4526847A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image receiving transparency and method of making
Assignee: Weber Marking Systems Inc
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Filing: 1983-04-15
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Granted: 1985-07-02
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Expires: 2003-04-15
Abstract
Abstract A transparency for the formation of an adherent electrostatic image thereon includes a polyester resin film sheet having an image-receiving coating of nitrocellulose, a plasticizer, a particulate material, and, preferably, an antistatic agent. The coating is applied to the film sheet from a solvent mixture of an aliphatic ester or an aliphatic ketone, and an aliphatic alcohol.
Inventors
- 👤 Stephen L. Walker
- 👤 Beatrice E. Thorpe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:38
CPC Classifications
G; G03; G03G; G03G7/00; G03G7/0006; G03G7/002; G03G7/0013; G03G7/0026; G03G7/0033; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31786; Y10T428/3179
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
58 words
A transparency for receiving adherently thereon a toner-developed latent electrostatic image, which consisting essentially of: a transparent polyester resin film sheet; and an image-receiving transparent coating on at least one surface of said sheet and comprising: (a) nitrocellulose as the sole film forming material, (b) a plasticizer, and (c) a particulate material slip agent dispersed in the coating.
Claim 2
Dependent Claim
58 words
A transparency for receiving adherently thereon a toner-developed latent electrostatic image, which consisting essentially of: a transparent polyester resin film sheet; and an image-receiving transparent coating on at least one surface of said sheet and comprising: (a) nitrocellulose as the sole film forming material, (b) a plasticizer, and (c) a particulate material slip agent dispersed in the coating.
Claim 3
Dependent Claim
27 words
A transparency as defined in claim 1 wherein said particulate material is present in a proportion of about 0.4 to 1.5 percent by weight of the coating.
Claim 4
Dependent Claim
15 words
A transparency as defined in claim 1 and including an antistatic agent in said coating.
Claim 5
Dependent Claim
13 words
A transparency as defined in claim 1 wherein said polyester is polyethylene terephthalate.
Claim 6
Dependent Claim
19 words
A transparency as defined in claim 4 wherein said plasticizer is castor oil and said particulate material is silica.
Claim 7
Dependent Claim
26 words
A transparency as defined in claim 5 wherein said silica is present in a proportion of about 0.5 to 1.5 percent by weight of the coating.
Claim 8
Dependent Claim
68 words
A transparency for receiving adherently thereon a toner-developed latent electrostatic image, which comprises: a polyethylene terephthalate resin film sheet; and an image-receiving coating on at least one surface of said sheet and comprising: (a) nitrocellulose, (b) castor oil plasticizer, (c) a fatty alcohol phosphate antistatic agent, and (d) particulate silica dispersed in the coating in a proportion of about 0.5 to 1.5 percent by weight of the coating.
Claim 9
Dependent Claim
68 words
A transparency for receiving adherently thereon a toner-developed latent electrostatic image, which comprises: a polyethylene terephthalate resin film sheet; and an image-receiving coating on at least one surface of said sheet and comprising: (a) nitrocellulose, (b) castor oil plasticizer, (c) a fatty alcohol phosphate antistatic agent, and (d) particulate silica dispersed in the coating in a proportion of about 0.5 to 1.5 percent by weight of the coating.
Claim 10
Dependent Claim
61 words
An imaged transparency which comprises a transparency for receiving adherently thereon a toner-developed latent electrostatic image, which comprises: a polyester resin film sheet; and an image-receiving coating on at least one surface of said sheet and comprising: (a) nitrocellulose, (b) a plasticizer, and (c) a particulate material dispersed in the coating; and a fused toner-developed latent electrostatic image on said coating.
Claim 11
Dependent Claim
61 words
An imaged transparency which comprises a transparency for receiving adherently thereon a toner-developed latent electrostatic image, which comprises: a polyester resin film sheet; and an image-receiving coating on at least one surface of said sheet and comprising: (a) nitrocellulose, (b) a plasticizer, and (c) a particulate material dispersed in the coating; and a fused toner-developed latent electrostatic image on said coating.
Claim 12
Dependent Claim
20 words
An imaged transparency which comprises the transparency of claim 7, and a fused toner-developed latent electrostatic image on said coating.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-07-01 | 1988-12-31 | 1989-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-01 | 1992-12-31 | 1993-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-01 | 1996-12-31 | 1997-07-02 | $7700.00 | Window Closed / Lapsed |