US4501621A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for removing a selenium layer from a substrate
Assignee: Konica Minolta Inc
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Filing: 1983-07-13
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Granted: 1985-02-26
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Expires: 2003-07-13
Abstract
Abstract A coating layer, such as a photosensitive selenium coating is removed from a substrate by producing cracks in the layer, introducing a volume expansive material into the cracks, and then causing the volume expansive material introduced into the cracks to expand and thereby dislodge the coating layer from the substrate.
Inventors
- 👤 Naoto Abe
- 👤 Hidetoshi Akimoto
- 👤 Hiroyuki Nomori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:48
CPC Classifications
B; B44; B44D; B44D3/00; B44D3/16; B08; B08B; B08B3/00; B08B3/04; B08B3/10; B08B7/00; B08B7/04; G; G03; G03G; G03G21/00; G03G5/00; G03G5/005
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
102 words
A method of treating a substrate having a nonpermeable coating layer thereon, said method consisting essentially of (1) exposing said substrate to a first high temperature of from about 50° C. to about 150° C. to produce cracks in said layer, then (2) immersing said coated substrate in a volume expansive liquid so that said liquid is introduced into the cracks, and then (3) exposing said substrate to a second high temperature which is above the boiling point of said expansive liquid to cause volume expansion of said liquid introduced into the cracks, whereby said coating layer is removed from said substrate.
Claim 2
Independent Claim
102 words
A method of treating a substrate having a nonpermeable coating layer thereon, said method consisting essentially of (1) exposing said substrate to a first high temperature of from about 50° C. to about 150° C. to produce cracks in said layer, then (2) immersing said coated substrate in a volume expansive liquid so that said liquid is introduced into the cracks, and then (3) exposing said substrate to a second high temperature which is above the boiling point of said expansive liquid to cause volume expansion of said liquid introduced into the cracks, whereby said coating layer is removed from said substrate.
Claim 3
Dependent Claim
15 words
The method of claim 1 wherein Steps 1 and 3 take place in hot tetrachloroethylene.
Claim 4
Dependent Claim
14 words
The method of claim 2 wherein said volume expansive liquid is immiscible with tetrachloroethylene.
Claim 5
Dependent Claim
19 words
The method of claim 2 wherein said volume expansive liquid has a boiling point lower than that of tetrachloroethylene.
Claim 6
Dependent Claim
12 words
The method of claim 2 wherein said volume expansive liquid is water.
Claim 7
Dependent Claim
17 words
The method of claim 1 wherein said layer is a photosensitive selenium layer for an electrophotographic photoreceptor.
Claim 8
Dependent Claim
17 words
The method of claim 3 wherein said layer is a photosensitive selenium layer for an electrophotographic photoreceptor.
Claim 9
Dependent Claim
17 words
The method of claim 4 wherein said layer is a photosensitive selenium layer for an electrophotographic photoreceptor.
Claim 10
Independent Claim
78 words
A method of treating a substrate for an electrophotographic photoreceptor having a photosensitive selenium coating layer thereon comprising (1) immersing said substrate in boiling tetrachloroethylene for a period of from 1 to 60 minutes, then (2) immersing said substrate in a liquid which is immiscible with tetrachloroethylene and which has a lower boiling point than that of tetrachloroethylene, and then (3) immersing said coated substrate in boiling tetrachloroethylene, whereby said photosensitive selenium layer is removed from said substrate.
Claim 11
Independent Claim
78 words
A method of treating a substrate for an electrophotographic photoreceptor having a photosensitive selenium coating layer thereon comprising (1) immersing said substrate in boiling tetrachloroethylene for a period of from 1 to 60 minutes, then (2) immersing said substrate in a liquid which is immiscible with tetrachloroethylene and which has a lower boiling point than that of tetrachloroethylene, and then (3) immersing said coated substrate in boiling tetrachloroethylene, whereby said photosensitive selenium layer is removed from said substrate.
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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) | 1988-02-26 | 1988-08-27 | 1989-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-26 | 1992-08-27 | 1993-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-26 | 1996-08-27 | 1997-02-26 | $7700.00 | Window Closed / Lapsed |