Patent US4352847A successfully refreshed from Google Patents.
US4352847A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transfer film for use in electrophotographic copiers
Assignee: Fujifilm Holdings Corp
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Filing: 1980-04-14
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Granted: 1982-10-05
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Expires: 2000-04-14
Abstract
Abstract A transfer film for use in electrophotographic copiers comprising a matted plastic film having a UL temperature index of at least 120° C. and at least one side of which has a surface roughness of at least 1.0 micron.
Inventors
- 👤 Toshiaki Okiyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:01
CPC Classifications
G; G03; G03G; G03G7/00; G03G7/0006; G03G7/002; G03G7/0026; G03G7/0046; G03G7/006; G03G7/0073; G03G7/008; G03G7/0086; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10S428/914; Y10S430/00; Y10S430/151; Y10T; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/24802; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265; Y10T428/31; Y10T428/31504; Y10T428/31507; Y10T428/31533; Y10T428/31786
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
81 words
A transfer film for use in electrophotographic copiers comprising a matted plastic film having a UL temperature index of at least 120° C. and at least one side of which has a surface roughness of at least 1.0 micron, said plastic film comprising a resin selected from the group consisting of a polysulfone resin, a polyarylate resin having repeated units represented by the formula ##STR4## and a chlorinated polycarbonate resin, said transfer film having an opacity of from 20 to 65%.
Claim 2
Dependent Claim
81 words
A transfer film for use in electrophotographic copiers comprising a matted plastic film having a UL temperature index of at least 120° C. and at least one side of which has a surface roughness of at least 1.0 micron, said plastic film comprising a resin selected from the group consisting of a polysulfone resin, a polyarylate resin having repeated units represented by the formula ##STR4## and a chlorinated polycarbonate resin, said transfer film having an opacity of from 20 to 65%.
Claim 3
Dependent Claim
22 words
A transfer film according to claim 1, wherein the film thickness is in the range of from about 25 to 100 microns.
Claim 4
Dependent Claim
20 words
A transfer film according to claim 2, wherein the film thickness is in the range of 35 to 80 microns.
Claim 5
Dependent Claim
18 words
A transfer film according to claim 1, wherein the film has an opacity of from 25 to 55%.
Claim 6
Dependent Claim
15 words
A transfer film according to claim 1 wherein said plastic film comprises said polysulfone resin.
Claim 7
Dependent Claim
15 words
A transfer film according to claim 5 wherein said polysulfone resin comprises polyether sulfone resin.
Claim 8
Dependent Claim
15 words
A transfer film according to claim 1 wherein said plastic film comprises said polyarylate resin.
Claim 9
Dependent Claim
16 words
A transfer film according to claim 1 wherein said plastic film comprises said chlorinated polycarbonate resin.
Claim 10
Dependent Claim
24 words
A transfer film according to claim 1, wherein said plastic film comprises said polysulfone resin which has repeating units represented by the formula ##STR5##
Claim 11
Dependent Claim
24 words
A transfer film according to claim 1, wherein said plastic film comprises said polysulfone resin which has repeating units represented by the formula ##STR6##
Claim 12
Dependent Claim
22 words
A transfer film according to claim 1, wherein said polyarylate resin has a UL temperature index of about 130° to 140° C.
References Cited (Backward Citations)
US3271229A
Cited
US3752731A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-10-04 | 1986-04-05 | 1986-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-04 | 1990-04-05 | 1990-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-04 | 1994-04-05 | 1994-10-05 | $7700.00 | Window Closed / Lapsed |