US4093532A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of silver from photographic film
Assignee: Anken Industries
•
Filing: 1977-01-21
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Granted: 1978-06-06
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Expires: 1997-01-21
Abstract
Abstract Apparatus for reclaiming silver from solution. Photographic film is transported through a plurality of compartments within which fluids act upon the constituents in the film coating. One of the compartments contains fluid that includes a silver complex dissolved therein, and a silver precipitating unit is positioned within that compartment. The precipitating unit includes anode-cathode elements connected to a source of electrical potential for depositing silver upon the elements.
Inventors
- 👤 Nick G. Branibar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:22
CPC Classifications
C; C25; C25C; C25C7/00; C25C1/00; C25C1/20
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
141 words
Apparatus for the electrodeposition of silver from solution comprising a housing having a removable cover and walls with grooves therein, anode-cathode plates within said housing and positioned with edge portions thereof within said grooved walls, said anode-cathode plates being maintained in spaced relation from one another, said removable cover including electrical contacts on the underside thereof in electrical contact-making engagement with said anode-cathode plates, said housing including a fluid inlet and outlet and a bottom compartment for receiving fluid under pressure from said fluid inlet and closed by a perforated plate at its top portion, the combined area of said perforations being less than the area of said fluid inlet, and support means of resilient material positioned on the upper surface of said perforated plate for supporting the lower edges of said anode-cathode plates in spaced relation from said perforated plate.
Claim 2
Dependent Claim
141 words
Apparatus for the electrodeposition of silver from solution comprising a housing having a removable cover and walls with grooves therein, anode-cathode plates within said housing and positioned with edge portions thereof within said grooved walls, said anode-cathode plates being maintained in spaced relation from one another, said removable cover including electrical contacts on the underside thereof in electrical contact-making engagement with said anode-cathode plates, said housing including a fluid inlet and outlet and a bottom compartment for receiving fluid under pressure from said fluid inlet and closed by a perforated plate at its top portion, the combined area of said perforations being less than the area of said fluid inlet, and support means of resilient material positioned on the upper surface of said perforated plate for supporting the lower edges of said anode-cathode plates in spaced relation from said perforated plate.
Claim 3
Dependent Claim
25 words
Apparatus according to claim 1 in which said support means is of resilient material and is positioned on the upper surface of said perforated plate.
Claim 4
Dependent Claim
28 words
Apparatus as in claim 1, in which said electrical contacts on the underside of said cover urge said lower edges of said anode-cathode plates against said resilient material.
Claim 5
Dependent Claim
81 words
Apparatus as in claim 1 and suitable for the reclaiming of silver from the silver-bearing coating on photographic film, including a container having a plurality of compartments through which said film is transported and containing fluids acting upon the constituents in said coating, one of said compartments containing fluid that includes a silver complex dissolved therein, said housing being positioned within said one compartment for passage therethrough of the fluid within that compartment and deposition of silver upon said anode-cathode plates.
Claim 6
Dependent Claim
41 words
Apparatus as in claim 4, in which said housing is positioned within said one compartment so that the level of fluid in that compartment is just below the top of said housing so as not to electrically short said electrical contacts.
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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) | 1981-06-05 | 1981-12-05 | 1982-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-05 | 1985-12-05 | 1986-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-05 | 1989-12-05 | 1990-06-06 | $7700.00 | Window Closed / Lapsed |