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US3200726A Expired / Lapsed US ⏱️ 0.0 years remaining

Method of treating photographic sheet with a liquid

Assignee: Polaroid Corp
•
Filing: 1962-02-15
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Granted: 1965-08-17
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Expires: 1982-02-15
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Abstract

No abstract record available.

Inventors

  • 👤 Edwin H Land

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-31 23:41
CPC Classifications
G; G03; G03D; G03D9/00; G03D9/02; G03B; G03B17/00; G03B17/48; G03B17/50; G03B17/52

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 184 words
IN THE TREATMENT OF A PHOTOGRAPHIC SHEET WITH A LIQUID DISTRIBUTED IN A LAYER IN CONTACT WITH SAID SHEET, THE METHOD COMPRISING: GUIDING SAID PHOTOGRAPHIC SHEET AND A SECOND SHEET ALONG CONVERGENT PATHS INTO SUPERPOSITION WITH ONE ANOTHER BETWEEN A PAIR OF MEMBERS HAVING OPPOSED SURFACES DEFINING SAID PATHS AND SUPPORTING SUPERPOSED PORTIONS OF SAID SHEETS AGAINST MOVEMENT APART FROM ONE NOTHER WITH SAID SUPERPOSED PORTIONS DISPOSED A PREDETERMINED DISTANCE APART; SUPPORTING A NOZZLE, HAVING A DISCHARGE MOUTH BOUNDED BY A PAIR OF LIPS WHICH ARE AT LEAST EQUAL IN LENGTH TO THE WIDTH OF THE AREA OF SAID SHEETS TO BE TREATED, BETWEEN SAID CONVERGENT PORTIONS OF SAID SHEETS AND HOLDING SAID LIPS IN SUBSTANTAILLY LIQUID-TIGHT CONTACT WITH SAID CONVERGENT PORTIONS OF SAID SHEETS; AND INTRODUCING A VISCOUS PHOTOGRAPHIC PROCESSING LIQUID THROUGH SAID NOZZLE BETWEEN SAID LIPS INTO CONTACT WITH THE ADJACENT SURFACES OF SAID SHEETS, SAID LIQUID BEING INTRODUCED UNDER PRESSURE SUFFICIENT TO CAUSE THE MOVEMENT OF SAID SHEETS ALONG SAID CONVERGENT PATHS PAST SAID LIPS INTO SUPERPOSITION BETWEEN SAID MEMBERS IN THE DIRECTION OF FLOW OF SAID LIQUID BETWEEN SAID LIPS.
Claim 2
Dependent Claim 184 words
IN THE TREATMENT OF A PHOTOGRAPHIC SHEET WITH A LIQUID DISTRIBUTED IN A LAYER IN CONTACT WITH SAID SHEET, THE METHOD COMPRISING: GUIDING SAID PHOTOGRAPHIC SHEET AND A SECOND SHEET ALONG CONVERGENT PATHS INTO SUPERPOSITION WITH ONE ANOTHER BETWEEN A PAIR OF MEMBERS HAVING OPPOSED SURFACES DEFINING SAID PATHS AND SUPPORTING SUPERPOSED PORTIONS OF SAID SHEETS AGAINST MOVEMENT APART FROM ONE NOTHER WITH SAID SUPERPOSED PORTIONS DISPOSED A PREDETERMINED DISTANCE APART; SUPPORTING A NOZZLE, HAVING A DISCHARGE MOUTH BOUNDED BY A PAIR OF LIPS WHICH ARE AT LEAST EQUAL IN LENGTH TO THE WIDTH OF THE AREA OF SAID SHEETS TO BE TREATED, BETWEEN SAID CONVERGENT PORTIONS OF SAID SHEETS AND HOLDING SAID LIPS IN SUBSTANTAILLY LIQUID-TIGHT CONTACT WITH SAID CONVERGENT PORTIONS OF SAID SHEETS; AND INTRODUCING A VISCOUS PHOTOGRAPHIC PROCESSING LIQUID THROUGH SAID NOZZLE BETWEEN SAID LIPS INTO CONTACT WITH THE ADJACENT SURFACES OF SAID SHEETS, SAID LIQUID BEING INTRODUCED UNDER PRESSURE SUFFICIENT TO CAUSE THE MOVEMENT OF SAID SHEETS ALONG SAID CONVERGENT PATHS PAST SAID LIPS INTO SUPERPOSITION BETWEEN SAID MEMBERS IN THE DIRECTION OF FLOW OF SAID LIQUID BETWEEN SAID LIPS.

References Cited (Backward Citations)

US1161346A Cited
US2520641A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1968-08-16 1969-02-15 1969-08-17 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1972-08-16 1973-02-15 1973-08-17 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1976-08-16 1977-02-15 1977-08-17 $7700.00 Window Closed / Lapsed

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