Patent US5212468A successfully refreshed from Google Patents.
Patent US3715280A successfully refreshed from Google Patents.
US3715280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mini-test dish
Assignee: United States Department of Health and Human Services
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Filing: 1970-07-14
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Granted: 1973-02-06
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Expires: 1990-07-14
Abstract
Abstract A method and apparatus for multiple test cultures having an open-topped container and a cover forming a dust-proof enclosure therewith. The container is partly filled with a culture supporting medium and a dividing member is inserted therein to divide the medium into plural open-topped test areas of equal volume. Cultures are then introduced into the various test areas to provide simultaneous multiple tests in the same support medium.
Inventors
- 👤 J Farmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:18
CPC Classifications
C; C12; C12M; C12M23/00; C12M23/02; C12M23/04; C12M23/34
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
97 words
The method of conducting a multiple test culture comprising the steps of pouring a layer of semisolid culture media at a temperature of approximately 45*-50*C into a sterilized open-topped container, maintaining the temperature of said media, inserting a sterilized dividing member comprising intersecting sets of equally spaced parallel walls into said container to divide said media into plural individual test areas, cooling said media in a sterile environment to provide gelling thereof, depositing test material into the various test areas to conduct simultaneous separate tests thereof, and covering said container to render the interior thereof substantially airtight.
Claim 2
Independent Claim
97 words
The method of conducting a multiple test culture comprising the steps of pouring a layer of semisolid culture media at a temperature of approximately 45*-50*C into a sterilized open-topped container, maintaining the temperature of said media, inserting a sterilized dividing member comprising intersecting sets of equally spaced parallel walls into said container to divide said media into plural individual test areas, cooling said media in a sterile environment to provide gelling thereof, depositing test material into the various test areas to conduct simultaneous separate tests thereof, and covering said container to render the interior thereof substantially airtight.
Claim 3
Dependent Claim
207 words
A test assembly for facilitating multiple testing of biochemical properties of microorganisms, in diagnostic and bacteriological laboratories embodying three components of plastic material compatible with the environment of testing usage and sterilizable to be reusable; said components comprising a tray having a closed bottom and a continuous, uninterrupted substantially vertical side wall portion; a divider member including cooperative intersecting sets of equally spaced uninterrupted divider walls defining interstices of substantially equal cross-sectional area, said divider walls having less vertical extent than the extent of said vertical side wall portion, said divider member being so dimensioned relative to said tray as to be removably insertable within said side wall portion in a close-fit relationship to define therewith and within said tray a plurality of open-topped compartments of equal volume adapted to confine a layer of culture supporting medium into a like plurality of individual equal volume test areas for receiving test material; and a closure including a closed top and at least a depending, continuous, uninterrupted side wall portion having external dimensions and an external configuration so related to the internal dimensions anD configuration of said vertical side wall portion of said tray as to closely fit therewith to isolate such test areas from contamination by ambient conditions.
Claim 4
Dependent Claim
207 words
A test assembly for facilitating multiple testing of biochemical properties of microorganisms, in diagnostic and bacteriological laboratories embodying three components of plastic material compatible with the environment of testing usage and sterilizable to be reusable; said components comprising a tray having a closed bottom and a continuous, uninterrupted substantially vertical side wall portion; a divider member including cooperative intersecting sets of equally spaced uninterrupted divider walls defining interstices of substantially equal cross-sectional area, said divider walls having less vertical extent than the extent of said vertical side wall portion, said divider member being so dimensioned relative to said tray as to be removably insertable within said side wall portion in a close-fit relationship to define therewith and within said tray a plurality of open-topped compartments of equal volume adapted to confine a layer of culture supporting medium into a like plurality of individual equal volume test areas for receiving test material; and a closure including a closed top and at least a depending, continuous, uninterrupted side wall portion having external dimensions and an external configuration so related to the internal dimensions anD configuration of said vertical side wall portion of said tray as to closely fit therewith to isolate such test areas from contamination by ambient conditions.
Claim 5
Dependent Claim
37 words
A test assembly as claimed in claim 2 in which said vertical side wall portions having an upper edge portion and said closure further including a horizontally extending continuous shoulder adapted to engage said upper edge portion.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-06 | 1976-08-07 | 1977-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-06 | 1980-08-07 | 1981-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-06 | 1984-08-07 | 1985-02-06 | $7700.00 | Window Closed / Lapsed |