Patent US4598050A successfully refreshed from Google Patents.
US4598050A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Culture plate for surfaces
Assignee: Individual
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Filing: 1983-12-02
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Granted: 1986-07-01
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Expires: 2003-12-02
Abstract
Abstract An easily loaded culture plate for microorganisms with an unconstrained flat agar surface for sampling flat areas.
Inventors
- 👤 Lewis R. Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:02
CPC Classifications
C; C12; C12M; C12M23/00; C12M23/02; C12M23/10; C12M23/38; C12M23/46; C12M25/00; C12M25/06; C12M33/00; C12M33/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
90 words
In a device for collecting microorganisms from surfaces and culturing them comprising a top lid, a first receptacle with a rim and having an agar-holding structure and agar flow-through means in it, a second receptacle with a rim and a flat, impermeable bottom, and a bottom lid, the improvement which comprises means for joining the first receptacle to the second receptacle whereby, when melted agar is poured into the first receptacle and allowed to solidify, a flat agar surface which extends beyond the bottom of the first receptacle is formed.
Claim 2
Dependent Claim
90 words
In a device for collecting microorganisms from surfaces and culturing them comprising a top lid, a first receptacle with a rim and having an agar-holding structure and agar flow-through means in it, a second receptacle with a rim and a flat, impermeable bottom, and a bottom lid, the improvement which comprises means for joining the first receptacle to the second receptacle whereby, when melted agar is poured into the first receptacle and allowed to solidify, a flat agar surface which extends beyond the bottom of the first receptacle is formed.
Claim 3
Dependent Claim
113 words
In an agar-containing assembly of the type having a top lid, a first receptacle having a rim and having an agar-holding structure in it, so that liquified agar, when poured into the receptacle and allowed to solidify, forms a plug of agar with a perimeter and a surface orthogonal to the perimeter, a second receptacle with a rim and a flat, impermeable bottom, and a bottom lid, the improvement which comprises sealing means between the first receptacle and the second receptacle which forms the agar plug so that the plug has a true flat surface, the perimeter of which is unconstrained within at least one millimeter of the rim of the first receptacle.
Claim 4
Dependent Claim
113 words
In an agar-containing assembly of the type having a top lid, a first receptacle having a rim and having an agar-holding structure in it, so that liquified agar, when poured into the receptacle and allowed to solidify, forms a plug of agar with a perimeter and a surface orthogonal to the perimeter, a second receptacle with a rim and a flat, impermeable bottom, and a bottom lid, the improvement which comprises sealing means between the first receptacle and the second receptacle which forms the agar plug so that the plug has a true flat surface, the perimeter of which is unconstrained within at least one millimeter of the rim of the first receptacle.
Claim 5
Dependent Claim
79 words
In an agar-containing assembly of the type having a top lid, a first receptacle having side walls with a bottom edge and having an agar-holding structure in it, a second receptacle with side walls with a top edge, and a flat, impermeable bottom, sealing means which seals the first receptacle to the second receptacle, and a bottom lid, the improvement which comprises axial spacing means between the sealing means and the bottom edge of the first receptacle's side walls.
Claim 6
Dependent Claim
79 words
In an agar-containing assembly of the type having a top lid, a first receptacle having side walls with a bottom edge and having an agar-holding structure in it, a second receptacle with side walls with a top edge, and a flat, impermeable bottom, sealing means which seals the first receptacle to the second receptacle, and a bottom lid, the improvement which comprises axial spacing means between the sealing means and the bottom edge of the first receptacle's side walls.
Claim 7
Dependent Claim
71 words
The assembly of claim 3 in which the side walls of the first receptacle taper toward its bottom edge, and, when the second receptacle is placed over the bottom of the first receptacle, the side walls of the second receptacle are of a size which sealingly engage the outer surface of the first receptacle walls before the bottom of the second receptacle can contact the bottom edge of the first receptacle.
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) | 1989-06-30 | 1989-12-30 | 1990-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-30 | 1993-12-30 | 1994-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-30 | 1997-12-30 | 1998-07-01 | $7700.00 | Window Closed / Lapsed |