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US3697299A Expired / Lapsed US ⏱️ 0.0 years remaining

Microscopy tissue receptacle method

Assignee: Individual
•
Filing: 1969-09-23
•
Granted: 1972-10-10
•
Expires: 1989-09-23
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Abstract

Abstract MINUTE TISSUE PARTICLES FOR LIGHT OR ELECTRON MICROSCOPY ARE PROCESSED IN A RECEPTACLE COMPRISED OF A POROUS POLYETHYLENE OR POLYPROPYLENE OPEN-ENDED, CYLINDRICAL BODY AND A PAIR OF POROUS HYDROPHICALLY TREATED POLYETHYLENE OR POLYPROPYLENE CAPS FOR CLOSING THE RESPECTIVE ENDS. DURING PROCESSING, TISSUE PARTICLES HAVING AT LEAST ONE DIMENSION IN THE ORDER OF ONE MILLIMETER ARE STORED IN THE RECEPTACLE AFTER WHICH THE RECEPTACLE IS SUBMERGED IN VARIOUS ORGANIC FIXATIVE AND PROCESSING LIQUIDS WHICH GAIN ACCESS TO THE PARTICLES BY PASSING THROUGH THE POROUS CYLINDRICAL BODY AND CAPS AND IN VARIOUS AQUEOUS FIXATIVE AND PROCESSING SOLUTIONS WHICH GAIN ACCESS TO THE TISSUE BY PASSING THROUGH THE POROUS HYDROPHICALLY TREATED CAPS.

Inventors

  • 👤 John E P Pickett

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-30 22:23
CPC Classifications
G; G01; G01N; G01N1/00; G01N1/28; G01N1/30; G01N1/31

Claims Analysis

Total Claims: 0
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References Cited (Backward Citations)

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USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1975-10-10 1976-04-10 1976-10-10 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-10-10 1980-04-10 1980-10-10 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-10-10 1984-04-10 1984-10-10 $7700.00 Window Closed / Lapsed

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