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US3404004A Expired / Lapsed US ⏱️ 0.0 years remaining

Final soak bath for processed silver halide prints

Assignee: JEAN R AKE
•
Filing: 1965-03-08
•
Granted: 1968-10-01
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Expires: 1985-03-08
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Abstract

No abstract record available.

Inventors

  • 👤 Jean R Ake

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-30 12:30
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/26; G03C5/268; Y; Y10; Y10S; Y10S430/00; Y10S430/164

Claims Analysis

Total Claims: 1
Claim 1
Independent Claim 270 words
A RAPID PROCESS FOR PRODUCING A STABLE VISIBLE IMAGE IN A PHOTOGRAPHIC SILVER HALIDE EMULSION LAYER CONTAINING A LATENT IMAGE COMPRISING, DEVELOPING SAID LAYER IN A PHOTOGRAPHIC DEVELOPING SOLUTION, STOPPING THE ACTION OF THE DEVELOPING SOLUTION BY IMMERSING THE EMULSION LAYER IN A STOP SOLUTION, FIXING THE RESULTANT LATENT IMAGE BY IMMERSING THE LAYER IN A STABILIZING SOLUTION, AND SUBSEQUENTLY TREATING THE LAYER IN A FINAL SOAK BATH TO REMOVE CHEMICAL RESIDUE FOR AN INTERVAL IN THE RANGE OF ONE SECOND TO THREE MINUTES, SAID FINAL SOAK BATH COMPRISING AN AQUEOUS SOLUTION CONTAINING AN ANIONIC SYNTHETIC DETERGENT HAVING A CARBON CHAIN LENGTH IN THE RANGE OF 7 TO 18 CARBON ATOMS PER MOLECULE AND SELECTED FROM THE GROUP CONSISTING OF AMMONIUM LAURYL SULFATE, SODIUM LAURYL SULFATE, POTASSIUM LAURYL SULFATE, ALKYLATED AROMATIC SULFONIC ACIDS, AND MIXTURES THEREOF, IN AN AMOUNT IN THE RANGE OF 0.002 TO 0.02 GRAM PER LITER, A PRINT FLATTENING AGENT SELECTED FROM THE GROUP CONSISTING OF PROPYLENE GLYCOL, HEXYLENE GLYCOL, ETHYLENE GLYCOL, GLYCEROL AND MIXTURES THEREOF IN AN AMOUNT IN THE RANGE OF 2.6X10-6 TO 65X10-6 GRAM MOLES PER LITER, A DEFOAMING AGENT SELECTED FROM THE GROUP CONSISTING OF METHYLHEXACARBONYL, SULFONATED OILS, SULFONATED SILICONES, AND MIXTURES THEREOF, IN AN AMOUNT IN THE RANGE OF 0.7X10-6 TO 23X10-6 GRAM MOLES PER LITER, AND A WATER SOFTENING AGENT SELECTED FROM THE GROUP CONSISTING OF SODIUM HEXAMETAPHOSPHATE, SODIUM PYROPHOSPHATE, SODIUM TETRAPHOSPHATE, AND MIXTURES THEREOF, IN AN AMOUNT IN THE RANGE OF 0.01 TO 0.15 GRAM PER LITER, AND RINSING THE RESULTANT PHOTOGRAPHIC IMAGE LAYER IN A MOVING WATER BATH FOR AN INTERVAL IN THE RANGE OF ONE TO TEN MINUTES.

References Cited (Backward Citations)

US2367516A Cited
US2556540A Cited
US2541470A Cited
US2943058A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1971-10-01 1972-04-01 1972-10-01 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1975-10-01 1976-04-01 1976-10-01 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1979-10-01 1980-04-01 1980-10-01 $7700.00 Window Closed / Lapsed

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