US4735778A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microtiter plate
Assignee: Kureha Corp
•
Filing: 1986-08-22
•
Granted: 1988-04-05
•
Expires: 2006-08-22
Abstract
Abstract A microtiter plate is made of a light-transmitting antistatic resin and defines at least one well. The bottom wall of the well is centrally equipped with a flat portion having a diameter of at least 1 mm and is preferably connected continuously to the corresponding peripheral wall by way of a rising part. The minimum radius of curvature of the inner wall of said well, said inner wall including said rising part, is preferably at least 0.5 mm.
Inventors
- 👤 Nobuo Maruyama
- 👤 Yoichi Shibata
- 👤 Teruaki Sekine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:22
CPC Classifications
B; B01; B01L; B01L3/00; B01L3/50; B01L3/508; B01L3/5085; G; G01; G01N; G01N31/00; G01N31/20; G01N35/00; G01N2035/00178; G01N2035/00277; G01N2035/00297; Y; Y10; Y10S; Y10S436/00; Y10S436/807; Y10S436/809; Y10T; Y10T428/00; Y10T428/24; Y10T428/24149
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
81 words
In a microtiter plate including at least one well having a bottom wall, the improvement wherein: said bottom wall of said well comprises a central flat portion having a diameter of at least 1 mm and wherein said plate is made of a light-transmitting antistatic resin composed of a graft copolymer obtained by graft-polymerizing at least one ethylenically-unsaturated monomer on a rubber-like backbone polymer which contains, as a constituent thereof, a monomer having an alkylene oxide group and an ethylenically-unsaturated bond.
Claim 2
Dependent Claim
81 words
In a microtiter plate including at least one well having a bottom wall, the improvement wherein: said bottom wall of said well comprises a central flat portion having a diameter of at least 1 mm and wherein said plate is made of a light-transmitting antistatic resin composed of a graft copolymer obtained by graft-polymerizing at least one ethylenically-unsaturated monomer on a rubber-like backbone polymer which contains, as a constituent thereof, a monomer having an alkylene oxide group and an ethylenically-unsaturated bond.
Claim 3
Dependent Claim
64 words
The microtiter plate as claimed in claim 1, wherein said well includes a continuous inner surface formation defined by a peripheral surface, a bottom wall surface and a curved merging surface continuously joining the peripheral surface and the bottom wall surface, and wherein the minimum radius of curvature of any portion of the inner surface formation of said well is at least 0.5 mm.
Claim 4
Dependent Claim
46 words
The microtiter plate as claimed in claim 1, wherein the halflife of the static surface electrification of said antistatic resin as measured by a static charge gauge is 30 seconds or shorter and the transmittance of whole light through said antistatic resin is 80% or higher.
Claim 5
Dependent Claim
38 words
The microtiter plate as claimed in claim 1, wherein the microtiter plate contains a plurality of wells arranged in a pattern of rows and columns and has tear grooves formed between at least adjacent rows of the wells.
Claim 6
Dependent Claim
56 words
In a microtiter plate having at least one well, the improvement comprising: said plate is made of a light-transmitting antistatic resin composed of a graft copolymer obtained by graft-polymerizing at least one ethylenically-unsaturated monomer on a rubber-like backbone polymer which contains, as a constituent thereof, a monomer having an alkylene oxide group and an ethylenically-unsaturated bond.
Claim 7
Dependent Claim
56 words
In a microtiter plate having at least one well, the improvement comprising: said plate is made of a light-transmitting antistatic resin composed of a graft copolymer obtained by graft-polymerizing at least one ethylenically-unsaturated monomer on a rubber-like backbone polymer which contains, as a constituent thereof, a monomer having an alkylene oxide group and an ethylenically-unsaturated bond.
Claim 8
Dependent Claim
46 words
The microtiter plate as claimed in claim 5, wherein the halflife of the static surface electrification of said antistatic resin as measured by a static charge gauge is 30 seconds or shorter and the transmittance of whole light through said antistatic resin is 80% or higher.
References Cited (Backward Citations)
US3494459A
Cited
US4154795A
Cited
US4146365A
Cited
US4292273A
Cited
US4501719A
Cited
US4527677A
Cited
US4483442A
Cited
US4615927A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-04-05 | 1991-10-05 | 1992-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-05 | 1995-10-05 | 1996-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-05 | 1999-10-05 | 2000-04-05 | $7700.00 | Window Closed / Lapsed |