US3785928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bacteriological titration tray
Assignee: Individual
•
Filing: 1971-01-27
•
Granted: 1974-01-15
•
Expires: 1991-01-27
Abstract
Abstract A MOLDED PLASTIC TITRATION TRAY CONTAINING A LARGE NUMBER OF SMALL OPEN TEST CUPS SERVING AS INDIVIDULA TEST TUBES AND WHICH ARE INTEGRAL WITH THE TRAY AND PROJECT DOWNWARDLY FROM THE TRAY EXCEPT FOR A LIP AT THE TOP OF EACH CUP WHICH PROJECTS ABOVE THE SURFACE OF THE TRAY TO PREVENT SERUM OR SOLUTION SPILLED ON THE TRAY SURFACE FROM CONTAMINATING THE TRAY CONTENTS OF THE CUP. IN ONE MODIFICATION THRER IS A SMALL HOLE IN THE BOTTOM OF EACH CUP, SMALL ENOUGH SO THAT SURFACE TENSION PREVENTS THE FLUID CONTENTS OF THE CUP FROM FLOWING THROUGH THE HOLE, BUT THE CONENTS CAN BE DISCHARGED AT WILL BY APPLYING A SONIC PROBE OR AIR PRESSURE TO THE CUP.
Inventors
- 👤 M Kessler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:12
CPC Classifications
B; B01; B01L; B01L3/00; B01L3/02; B01L3/021
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |