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US3368472A
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Device for maintaining a photographic processing solution at a predetermined composition
Assignee: Gevaert Photo Producten NV
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Filing: 1964-12-21
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Granted: 1968-02-13
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Expires: 1984-12-21
Abstract
No abstract record available.
Inventors
- 👤 Leo Paul Van Bouwel
- 👤 Tack Willy Pieter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:55
CPC Classifications
G; G01; G01F; G01F11/00; G01F11/28; B; B01; B01J; B01J4/00; B01J4/02; G03; G03D; G03D3/00; G03D3/02; G03D3/06; G03D3/065; Y; Y10; Y10T; Y10T137/00; Y10T137/2713; Y10T137/2774
Claims Analysis
Total Claims: 0
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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) | 1971-02-12 | 1971-08-14 | 1972-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-12 | 1975-08-14 | 1976-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-12 | 1979-08-14 | 1980-02-13 | $7700.00 | Window Closed / Lapsed |