Patent US3660243A successfully refreshed from Google Patents.
US3660243A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Petri dish with compartment for sterilized spreading element
Assignee: Boeing North American Inc
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Filing: 1970-03-16
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Granted: 1972-05-02
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Expires: 1990-03-16
Abstract
Abstract A petri dish compartment for a sterile ball for use with an automatic spreading element is provided with at least one sloping surface for release and recovery of the ball. The sloping surface has its highest point adjacent a recessed area in the compartment, the recessed area housing the spreading element prior to and after streaking.
Inventors
- 👤 Cecil G Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:50
CPC Classifications
C; C12; C12M; C12M23/00; C12M23/02; C12M23/10; C12M33/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
28 words
The combination recited in claim 1 wherein said compartment comprises at least two sloping surfaces extending downwardly from said recessed area toward the bottom of said petri dish.
Claim 2
Dependent Claim
26 words
The combination recited in claim 2 wherein one of said sloping surfaces terminates prior to contact with the surface of the bottom of said petri dish.
Claim 3
Dependent Claim
43 words
The combination recited in claim 1 wherein said compartment has at least one sloping surface extending downwardly from said recessed area to the surface of said petri dish, the heighth of said sloping surface increasing along a circumference interior to said petri dish.
Claim 4
Dependent Claim
54 words
The combination recited in claim 1 wherein said compartment comprises at least one sloping surface extending downwardly from said recessed area to the surface of said petri dish, the heighth of said sloping surface increasing along a radius moving from the center of said petri dish towards the outer circumference of said petri dish.
Claim 5
Dependent Claim
19 words
The combination recited in claim 2 wherein said recessed area is located between two sloping surFaces of said compartment.
Claim 6
Dependent Claim
22 words
The combination recited in claim 6 wherein all surfaces of said recessed area are below the highest point of said sloping surfaces.
Claim 7
Dependent Claim
23 words
The combination recited in claim 4 wherein said compartment further comprises a vertical partition between said radially sloping surface and said recessed area.
Claim 8
Dependent Claim
23 words
The combination recited in claim 5 wherein said compartment further comprises a vertical partition between said circumferentially sloping surface and said recessed area.
Claim 9
Dependent Claim
13 words
The combination recited in claim 1 wherein said compartment has two recessed areas.
Claim 10
Dependent Claim
36 words
The combination recited in claim 10 wherein said two recessed areas are adjacent each other and wherein one sloping surface extends downwardly from each recessed area to the surface of the bottom of said petri dish.
Claim 11
Dependent Claim
333 words
A petri dish having sides including a cover having sides, said dish comprising: a floor portion holding an agar layer, a magnetic ball element to spread a specimen sample on said agar layer in said dish, a separate compartment, said compartment having a recessed area, said recessed area having a partition therethrough, a first sloping surface extending downwardly from a first partitioned area of said recessed area towards the surface of the bottom of said petri dish, a first vertical separation between said first sloping surface and said first partitioned area of said recessed area, said vertical separation extending above the bottom of said recessed area and extending to a height above the bottom of said petri dish, the clearance between said cover and the uppermost part of said first vertical separation being insufficient to permit passage of said element to spread a specimen sample from said recessed area to said first sloping surface without necessitating the raising of said cover to permit passage of said element, said raising of said cover being to a heighth insufficient to allow any portion of a side of said cover to be above any side of said petri dish, a second sloping surface extending downwardly from a second partitioned area of said recessed area towards the surface of the bottom of said petri dish, and a second vertical separation extending downwardly from the highest point on said second sloping surface to a second partitioned area of said recessed area, the clearance between said cover and the uppermost part of said second vertical separation being insufficient to permit passage of said element to spread a specimen sample on said agar layer from said second sloping surface to said second partitioned area of said recessed area without necessitating the raising of said cover to permit passage of said element, said raising of said cover being to a heighth insufficient to allow any portion of a side of said cover to be above any side of said petri dish.
References Cited (Backward Citations)
US3623958A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |