Patent US4618408A successfully refreshed from Google Patents.
US4618408A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Casting apparatus for electrophoretic gel tray
Assignee: Lab Stuff Inc
•
Filing: 1984-11-29
•
Granted: 1986-10-21
•
Expires: 2004-11-29
Abstract
Abstract A casting apparatus for receiving electrophoretic gel trays is disclosed. The casting apparatus includes a pair of spaced apart seal elements which are movable with respect to one another to provide one or, more openings of varying size to receive a corresponding gel tray therein. The open ends of the gel tray are sealed by the seal elements so that hot argrose or polyacrylamide gel may be poured into the gel tray for forming a gel layer of predetermined thickness. The seal elements are maintained in sealing engagement with the open ends of the gel trays by means of a rod frictionally engaged between a portion of the housing forming the casting apparatus and one of the seal elements.
Inventors
- 👤 Richard Malavarca
- 👤 Thomas Livelli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:22
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/416; G01N27/447; G01N27/44704
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
154 words
An apparatus for casting an electrophoretic separation medium within a received tray having open ends, said apparatus comprising a housing, first sealing means and second sealing means arranged spaced apart within said housing for sealing the open ends of said tray when brought into engagement therewith, said first sealing means supporting a first gasket for sealing one open end of said tray and arranged opposing said second sealing means, said second sealing means supporting a second gasket and arranged opposing said first gasket for sealing the other open end of said tray, said first sealing means being movable with respect to said second sealing means, and guide means in operative association with said first sealing means for adjusting the spaced apart relationship between said first sealing means and said second sealing means so as to receive said tray therebetween with said open ends in sealing engagement with said first gasket and said second gasket.
Claim 2
Independent Claim
154 words
An apparatus for casting an electrophoretic separation medium within a received tray having open ends, said apparatus comprising a housing, first sealing means and second sealing means arranged spaced apart within said housing for sealing the open ends of said tray when brought into engagement therewith, said first sealing means supporting a first gasket for sealing one open end of said tray and arranged opposing said second sealing means, said second sealing means supporting a second gasket and arranged opposing said first gasket for sealing the other open end of said tray, said first sealing means being movable with respect to said second sealing means, and guide means in operative association with said first sealing means for adjusting the spaced apart relationship between said first sealing means and said second sealing means so as to receive said tray therebetween with said open ends in sealing engagement with said first gasket and said second gasket.
Claim 3
Dependent Claim
20 words
The apparatus of claim 1 wherein said first sealing means comprises a first partition having said first gasket supported thereon.
Claim 4
Dependent Claim
30 words
The apparatus of claim 2 wherein said second sealing means comprises a second partition having said second gasket supported thereon, and said second partition movable relative to said first partition.
Claim 5
Dependent Claim
25 words
The apparatus of claim 2 wherein said second sealing means is supported by a portion of said housing and arranged opposing said first sealing means.
Claim 6
Dependent Claim
30 words
The apparatus of claim 1 wherein said guide means comprises a pair of spaced apart rods extending through said housing between said first sealing means and said second sealing means.
Claim 7
Dependent Claim
42 words
The apparatus of claim 5 wherein said first sealing means includes a pair of spaced apart openings each receiving one of said rods for permitting movement of said first sealing means along said rods in spaced relationship with said second sealing means.
Claim 8
Dependent Claim
29 words
The apparatus of claim 1 further including securing means for maintaining said first sealing means and said second sealing means in engagement with said open ends of said tray.
Claim 9
Independent Claim
182 words
An apparatus for casting an electrophoretic separation medium within a received first tray having open ends, said apparatus comprising a housing, first sealing means and second sealing means arranged opposing one another in spaced apart relationship within said housing for sealing the open ends of said tray when brought into engagement therewith, said first sealing means and said second sealing means being movable with respect to each other, guide means in operative association with said first sealing means and said second sealing means for adjusting the spaced apart relationship between said sealing means to provide a first opening for receiving said tray with its open ends in engagement with said first sealing means and said second sealing means, and a bar removaby arranged between and in engagement with a portion of said housing and said first sealing means for maintaining said first sealing means and said second sealing means in sealing engagement with said open ends of said tray while casting said separation medium therein, said first tray being removable from said apparatus upon removal of said bar from its engaged position.
Claim 10
Independent Claim
182 words
An apparatus for casting an electrophoretic separation medium within a received first tray having open ends, said apparatus comprising a housing, first sealing means and second sealing means arranged opposing one another in spaced apart relationship within said housing for sealing the open ends of said tray when brought into engagement therewith, said first sealing means and said second sealing means being movable with respect to each other, guide means in operative association with said first sealing means and said second sealing means for adjusting the spaced apart relationship between said sealing means to provide a first opening for receiving said tray with its open ends in engagement with said first sealing means and said second sealing means, and a bar removaby arranged between and in engagement with a portion of said housing and said first sealing means for maintaining said first sealing means and said second sealing means in sealing engagement with said open ends of said tray while casting said separation medium therein, said first tray being removable from said apparatus upon removal of said bar from its engaged position.
Claim 11
Dependent Claim
39 words
The apparatus of claim 8 wherein said first sealing means and said second sealing means each comprise a partition having a gasket arranged opposing one another for sealing the open ends of said tray when within said first opening.
Claim 12
Dependent Claim
30 words
The apparatus of claim 9 wherein said guide means comprises a pair of spaced apart rods extending through said housing between said first sealing means and said second sealing means.
Claim 13
Dependent Claim
45 words
The apparatus of claim 10 wherein said partitions formed of said first sealing means and said second sealing means are movably supported by said rods for movement of said partitions in spaced relationship with one another to provide said first opening having a variable size.
Claim 14
Dependent Claim
45 words
The apparatus of claim 8 wherein said spaced apart relationship of said first sealing means and said second sealing means further provides a second opening between a portion of said housing and said second sealing means for receiving therein a second tray having open ends.
Claim 15
Dependent Claim
39 words
The apparatus of claim 12 further including third sealing means supported by said housing within said second opening for sealing one open end of said second tray while its other open end is sealed by said second sealing means.
Claim 16
Dependent Claim
32 words
The apparatus of claim 13 wherein said second sealing means comprises a partition having a gasket arranged on both sides thereof and opposing said first sealing means and said third sealing means.
Claim 17
Dependent Claim
55 words
The apparatus of claim 14 wherein said bar arranged between said first sealing means and a portion of said housing maintains said first sealing means, second sealing means and third sealing means in engagement with the open ends of said first tray and said second tray provided within said first opening and said second opening.
Claim 18
Independent Claim
190 words
An apparatus for casting an electrophoretic gel within a plurality of received trays having open ends, said apparatus comprising a housing, a first seal element, a second seal element, and a third seal element, said seal elements arranged within said housing in spaced apart relationship, said first seal element and said second seal element being movable with respect to each other, guide means for adjusting the relative position of said first seal element and said second seal element within said housing for providing (1) a first receiving portion between said first seal element and second seal element for receiving a first tray therein with its open ends in engagement with said first seal element and said second seal element and (2) a second receiving portion between said second seal element and said third seal element for receiving a second tray therein with its open ends in engagement with said second seal element and said third seal element, and securing means for maintaining said first seal element, said second seal element and said third seal element in sealing engagement with the open ends of said first tray and said second tray.
Claim 19
Independent Claim
190 words
An apparatus for casting an electrophoretic gel within a plurality of received trays having open ends, said apparatus comprising a housing, a first seal element, a second seal element, and a third seal element, said seal elements arranged within said housing in spaced apart relationship, said first seal element and said second seal element being movable with respect to each other, guide means for adjusting the relative position of said first seal element and said second seal element within said housing for providing (1) a first receiving portion between said first seal element and second seal element for receiving a first tray therein with its open ends in engagement with said first seal element and said second seal element and (2) a second receiving portion between said second seal element and said third seal element for receiving a second tray therein with its open ends in engagement with said second seal element and said third seal element, and securing means for maintaining said first seal element, said second seal element and said third seal element in sealing engagement with the open ends of said first tray and said second tray.
Claim 20
Dependent Claim
72 words
The apparatus of claim 16 wherein said first seal element comprises a first partition having a gasket on one side thereof, said second seal element comprises a second partition having a gasket on opposite sides thereof, one gasket of said second partition opposing said gasket of said first partition, and said third seal element comprising a gasket supported by a portion of said housing opposing the other gasket of said second partition.
Claim 21
Dependent Claim
47 words
The apparatus of claim 17 wherein said guide means comprises a pair of parallel spaced apart rods extending through said housing for movably supporting said first partition and said second partition thereon in spaced apart relationships for providing said first receiving portion and said second receiving portion.
Claim 22
Dependent Claim
24 words
The apparatus of claim 18 wherein said securing means comprises a removable rod arranged between a portion of said housing and said first partition.
Claim 23
Dependent Claim
16 words
The apparatus of claim 16 wherein said first tray and second tray are of different length.
References Cited (Backward Citations)
US824235A
Cited
US968285A
Cited
US1166770A
Cited
US1829114A
Cited
GB1003047A
Cited
US3767560A
Cited
US3635808A
Cited
US3762877A
Cited
US3785608A
Cited
US3803020A
Cited
US3766047A
Cited
US4035377A
Cited
US4199129A
Cited
US4194863A
Cited
US4234400A
Cited
US4314897A
Cited
US4314897B1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-10-20 | 1990-04-21 | 1990-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-20 | 1994-04-21 | 1994-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-20 | 1998-04-21 | 1998-10-21 | $7700.00 | Window Closed / Lapsed |