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US2768948A Expired / Lapsed US ⏱️ 0.0 years remaining

Method and apparatus for ionography

Assignee: Precision Scientific Co
•
Filing: 1952-05-19
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Granted: 1956-10-30
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Expires: 1972-05-19
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Abstract

No abstract record available.

Inventors

  • 👤 Hugh J Mcdonald
  • 👤 Martin B Williamson

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-27 22:10
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/416; G01N27/447; G01N27/44756

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 201 words
IN AN IONOGRAPH FOR CARRYING ON ELECTROPHORESIS AND INOPHORESIS ON A PAPER STRIP MOISTENED WITH AN ELECTRICALLY CONDUCTIVE LIQUID, THE COMBINATION COMPRISING HORIZONTALLY-SPACED SUPPORTS DISPOSED IN A COMMON HORIZONTAL PLANE AND ADAPTED TO SUPPORT THEREON AND THEREBETWEEN A STRIP OF PAPER APPLIED OVER SAID SUPPORTS WITH OPPOSITE END PORTIONS OF SAID APPLIED STRIP DEPENDING FROM SAID SUPPORTS, MEANS ADAPTED TO POSITIVELY ENGAGE SAID APPLIED STRIP FOR SUSPENDING THE MEDIAL PORTION THEREOF BETWEEN SAID SUPPORTS AND FOR HOLDING SAID MEDIAL PORTION UNDER TENSION IN SUBSTANTIALLY FLAT CONDITION WITHIN SAID HORIZONTAL PLANE, A CONTAINER FOR A CONDUCTIVE LIQUID POSITIONED ADJACENT EACH SUPPORT AND ADAPTED TO RECEIVE THE DEPENDING OPPOSITE END PORTIONS OF SAID APPLIED STRIP FOR IMMERSING SAID END PORTIONS IN RESPECTIVE QUANTITIES OF THE CONDUCTIVE LIQUID, AN AUXILIARY CONTAINER POSITIONED BETWEEN SAID FIRST MENTIONED CONTAINERS FOR HOLDING A QUANTITY OF THE CONDUCTIVE LIQUID, A WICK HAVING A PORTION DISPOSED WITHIN THE CONDUCTIVE LIQUID IN SAID AUXILIARY CONTAINER AND A PORTION ADAPTED TO CONTACT THE APPLIED STRIP FOR CONVEYING LIQUID FROM THE AUXILIARY CONTAINER TO SAID APPLIED STRIP AT A POINT BETWEEN THE END THEREOF, AND MEANS FOR APPLYING AN ELECTRICAL POTENTIAL BETWEEN THE CONTAINERS TO PRODUCE A CURRENT IN SAID APPLIED STRIP.
Claim 2
Dependent Claim 201 words
IN AN IONOGRAPH FOR CARRYING ON ELECTROPHORESIS AND INOPHORESIS ON A PAPER STRIP MOISTENED WITH AN ELECTRICALLY CONDUCTIVE LIQUID, THE COMBINATION COMPRISING HORIZONTALLY-SPACED SUPPORTS DISPOSED IN A COMMON HORIZONTAL PLANE AND ADAPTED TO SUPPORT THEREON AND THEREBETWEEN A STRIP OF PAPER APPLIED OVER SAID SUPPORTS WITH OPPOSITE END PORTIONS OF SAID APPLIED STRIP DEPENDING FROM SAID SUPPORTS, MEANS ADAPTED TO POSITIVELY ENGAGE SAID APPLIED STRIP FOR SUSPENDING THE MEDIAL PORTION THEREOF BETWEEN SAID SUPPORTS AND FOR HOLDING SAID MEDIAL PORTION UNDER TENSION IN SUBSTANTIALLY FLAT CONDITION WITHIN SAID HORIZONTAL PLANE, A CONTAINER FOR A CONDUCTIVE LIQUID POSITIONED ADJACENT EACH SUPPORT AND ADAPTED TO RECEIVE THE DEPENDING OPPOSITE END PORTIONS OF SAID APPLIED STRIP FOR IMMERSING SAID END PORTIONS IN RESPECTIVE QUANTITIES OF THE CONDUCTIVE LIQUID, AN AUXILIARY CONTAINER POSITIONED BETWEEN SAID FIRST MENTIONED CONTAINERS FOR HOLDING A QUANTITY OF THE CONDUCTIVE LIQUID, A WICK HAVING A PORTION DISPOSED WITHIN THE CONDUCTIVE LIQUID IN SAID AUXILIARY CONTAINER AND A PORTION ADAPTED TO CONTACT THE APPLIED STRIP FOR CONVEYING LIQUID FROM THE AUXILIARY CONTAINER TO SAID APPLIED STRIP AT A POINT BETWEEN THE END THEREOF, AND MEANS FOR APPLYING AN ELECTRICAL POTENTIAL BETWEEN THE CONTAINERS TO PRODUCE A CURRENT IN SAID APPLIED STRIP.
Claim 3
Independent Claim 72 words
A METHOD OF CARRYING ON ELECTROPHORESIS AND IONOPHORESIS ALONG A PAPER STRIP, COMPRISING WETTING THE STRIP WITH A CONDUCTIVE LIQUID, LEVELING THE STRIP, ADDING A TEST SMPLE TO THE STRIP, PRODUCING A VOLTAGE GRADIENT ALONG THE STRIP, SURROUNDING THE STRIP WITH AN ATMOSPHERE OF A GAS HAVING HIGH HEAT CONDUCTIVITY SUBSTANTIALLY GREATER THAN THAT OF AIR AND SATURATED WITH VAPOR OF THE CONDUCTIVE LIQUID, AND MAINTAINING THE ATMOSPHERE AT A CONSTANT TEMPERATURE.
Claim 4
Independent Claim 72 words
A METHOD OF CARRYING ON ELECTROPHORESIS AND IONOPHORESIS ALONG A PAPER STRIP, COMPRISING WETTING THE STRIP WITH A CONDUCTIVE LIQUID, LEVELING THE STRIP, ADDING A TEST SMPLE TO THE STRIP, PRODUCING A VOLTAGE GRADIENT ALONG THE STRIP, SURROUNDING THE STRIP WITH AN ATMOSPHERE OF A GAS HAVING HIGH HEAT CONDUCTIVITY SUBSTANTIALLY GREATER THAN THAT OF AIR AND SATURATED WITH VAPOR OF THE CONDUCTIVE LIQUID, AND MAINTAINING THE ATMOSPHERE AT A CONSTANT TEMPERATURE.

References Cited (Backward Citations)

US2118957A Cited
US2555487A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1959-10-30 1960-04-30 1960-10-30 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1963-10-30 1964-04-30 1964-10-30 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1967-10-30 1968-04-30 1968-10-30 $7700.00 Window Closed / Lapsed

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