US4545958A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microtitration plate
Assignee: Siemens Healthcare Diagnostics GmbH Germany
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Filing: 1983-04-18
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Granted: 1985-10-08
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Expires: 2003-04-18
Abstract
Abstract A microtitration plate wherein a frame and a central part are separated from one another via a continuous break and ridges are arranged at the lower face of the plate so that differences in temperature on heating between edge vessels and vessels in the central part are avoided, said differences in temperature causing the well-known "edge-effect".
Inventors
- 👤 Hans-Detlef Dopatka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:51
CPC Classifications
B; B01; B01L; B01L3/00; B01L3/50; B01L3/508; B01L3/5085; B01L3/50851; Y; Y10; Y10S; Y10S436/00; Y10S436/807; Y10S436/809
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
134 words
A microtitration plate adapted to be heated, comprising: a continuous frame part having sidewalls and an upper surface extending within said frame part and projecting inwardly a predetermined distance from said sidewalls, said upper surface having an inwardly directed facing edge; a central well portion situated within said frame part interiorly of said facing edge and having a plurality of vessels mounted thereon, said vessels having a predetermined height and width, said facing edge and the outer surface of said well portion defining a gap between said frame part and said well portion; and an arrangement of ridges, said ridges being transverse support members integrally connected to diametrically opposed points on said sidewalls, said ridges also being spaced longitudinally within said frame part, said ridges supporting said central well portion within said frame part.
Claim 2
Dependent Claim
134 words
A microtitration plate adapted to be heated, comprising: a continuous frame part having sidewalls and an upper surface extending within said frame part and projecting inwardly a predetermined distance from said sidewalls, said upper surface having an inwardly directed facing edge; a central well portion situated within said frame part interiorly of said facing edge and having a plurality of vessels mounted thereon, said vessels having a predetermined height and width, said facing edge and the outer surface of said well portion defining a gap between said frame part and said well portion; and an arrangement of ridges, said ridges being transverse support members integrally connected to diametrically opposed points on said sidewalls, said ridges also being spaced longitudinally within said frame part, said ridges supporting said central well portion within said frame part.
Claim 3
Dependent Claim
30 words
A microtitration plate as recited in claim 1, wherein said plurality of vessels are arranged in rows and each one of said rows is disposed adjacent one of said ridges.
Claim 4
Dependent Claim
27 words
A microtitration plate as recited in claim 1, wherein said ridges have ends that are tapered at the regions of connection between said ridges and said sidewall.
Claim 5
Dependent Claim
22 words
A microtitration plate as recited in claim 1, wherein the height of said vessels is greater than the width of said vessels.
Claim 6
Dependent Claim
15 words
A microtitration plate as recited in claim 1, including means for heating said microtitration plate.
Claim 7
Dependent Claim
21 words
A microtitration plate as recited in claim 1, wherein said sidewalls include a base portion having a plurality of spaced indentations.
Claim 8
Dependent Claim
29 words
A microtitration plate as recited in claim 6, wherein said indentations are individually positioned between adjacent ones of said longitudinally spaced ridges to facilitate fluid movement through the sidewalls.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-10-07 | 1989-04-08 | 1989-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-10-07 | 1993-04-08 | 1993-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-10-07 | 1997-04-08 | 1997-10-08 | $7700.00 | Window Closed / Lapsed |