US4687577A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Container for the purification of liquids
Assignee: Agfa Gevaert AG
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Filing: 1986-09-02
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Granted: 1987-08-18
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Expires: 2006-09-02
Abstract
Abstract Container for active purifying agent for the purification of liquids, in particular photographic processing baths, comprising a container bottom above which is a space (2) for containing active purifying substance, a closure mechanism (5), an inlet tube (6) and a discharge tube (7) wherein a porous, compressible mass (4) is arranged between the space (2) for active purifying substance and the closure device (5).
Inventors
- 👤 Karl-Heinz Reuter
- 👤 Heinz Meckl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:15
CPC Classifications
C; C02; C02F; C02F9/00; C02F9/20
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
89 words
Container for the purification of photographic processing baths comprising a container bottom above which is a space containing an anion exchanger and comprising a closure device, characterised in that a porous compressible foam is arranged between the space containing said anion exchanger and the closure device; and that rigidly connected to the closure device are an inlet tube extending through the interior of the container to almost the bottom of the container and a discharge tube the inner open end of which is situated close to the closure device.
Claim 2
Dependent Claim
89 words
Container for the purification of photographic processing baths comprising a container bottom above which is a space containing an anion exchanger and comprising a closure device, characterised in that a porous compressible foam is arranged between the space containing said anion exchanger and the closure device; and that rigidly connected to the closure device are an inlet tube extending through the interior of the container to almost the bottom of the container and a discharge tube the inner open end of which is situated close to the closure device.
Claim 3
Dependent Claim
29 words
Container according to claim 1, characterised in that the inner open end of the inlet tube extends into an additional porous compressible foam on the bottom of the container.
References Cited (Backward Citations)
US2014445A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-08-17 | 1991-02-16 | 1991-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-17 | 1995-02-16 | 1995-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-17 | 1999-02-16 | 1999-08-18 | $7700.00 | Window Closed / Lapsed |