Patent US4517282A successfully refreshed from Google Patents.
US4517282A
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US
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Process for developing or peeling alkali-type photosensitive film and apparatus used therein
Assignee: Resonac Corp
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Filing: 1982-10-12
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Granted: 1985-05-14
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Expires: 2002-10-12
Abstract
Abstract A developing or peeling solution for developing or imagewisely peeling an alkali-type photosensitive film containing a suspension of released photosensitive film is regenerated by introducing one or more reagents and a gas for depositing the suspension in floating state and removing the floated deposit by a skimmer from the developing or peeling solution. The regenerated developing or peeling solution can be used again and again for the development or peeling.
Inventors
- 👤 Yoshiaki Tomisawa
- 👤 Seiji Kinoda
- 👤 Eiji Fujita
- 👤 Masanori Murata
- 👤 Toshio Takeuchi
- 👤 Ken Ogawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:52
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/26; G03F7/30; G03F7/3092
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
103 words
A process for developing or imagewisely peeling an alkali-type photosensitive film which comprises developing or imagewisely peeling an alkali-type photosensitive film with an alkali developing or peeling solution, taking off the developing or peeling solution containing a released photosensitive film suspension from a developing or peeling device, introducing a cationic polyamine resin, methyl isobutyl carbinol and a gas into the developing or peeling solution to effect flocculation of particles of the released photosensitive film suspension, removing the flocculated particles in a floating state from the developing or peeling solution, and recycling the resulting developing or peeling solution to the developing or peeling device.
Claim 2
Dependent Claim
103 words
A process for developing or imagewisely peeling an alkali-type photosensitive film which comprises developing or imagewisely peeling an alkali-type photosensitive film with an alkali developing or peeling solution, taking off the developing or peeling solution containing a released photosensitive film suspension from a developing or peeling device, introducing a cationic polyamine resin, methyl isobutyl carbinol and a gas into the developing or peeling solution to effect flocculation of particles of the released photosensitive film suspension, removing the flocculated particles in a floating state from the developing or peeling solution, and recycling the resulting developing or peeling solution to the developing or peeling device.
Claim 3
Dependent Claim
18 words
A process according to claim 1, wherein the gas for floating the deposited suspension is a bubbling air.
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) | 1988-05-13 | 1988-11-12 | 1989-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-13 | 1992-11-12 | 1993-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-13 | 1996-11-12 | 1997-05-14 | $7700.00 | Window Closed / Lapsed |