Patent US3555990A successfully refreshed from Google Patents.
US3555990A
Expired / Lapsed
US
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Apparatus for processing photographic prints
Assignee: EGON A DITTMAN
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Filing: 1968-04-29
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Granted: 1971-01-19
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Expires: 1988-04-29
Abstract
Abstract Apparatus for photographic development of either color or blackand-white prints using standard developing chemicals. An inclined platen receives the photographic paper. At the top of the platen is a transverse tube formed with spray holes, at the bottom a trough collecting liquid running off the lower end of the platen; sides of the platen retain the chemicals thereon. The trough has a discharge hose for draining chemicals into containers for reuse or rinse water into the sink and also a pump for recirculating chemicals through the tube. The tube has a valve and water connection to rinse water at one end and a connection to the pump at the other.
Inventors
- 👤 Egon A Dittman
- 👤 Marvin H Lincer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:26
CPC Classifications
G; G03; G03D; G03D5/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
24 words
Apparatus according to claim 1 in which said platen is supported by said support means at an angle of about 20* to the horizontal.
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) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |