Patent US2728825A successfully refreshed from Google Patents.
US3999949A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Product for use in chemical working operations
Assignee: Duni Bila AB
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Filing: 1974-12-27
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Granted: 1976-12-28
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Expires: 1994-12-27
Abstract
Abstract A product employable in chemical working operations, for instance pipetting, where one or several devices are moved between, inserted into and withdrawn from a plurality of liquid containers arranged in a row, with the product preventing undesirable transfer of liquid between the containers. The product includes a layer of an absorbent material covering the openings into the liquid containers and closely engaging the devices to wipe off and clean their exteriors. The layer of absorbent material is fixed to a supporting layer provided with oval holes arranged to register with the openings into the liquid containers.
Inventors
- 👤 Karl Gosta Bertil Andersson
- 👤 Nils Arvid Norman Bjork
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:35
CPC Classifications
B; B01; B01L; B01L3/00; B01L3/50; B01L3/508; B01L3/5082; B01L3/50825; B32; B32B; B32B3/00; B32B3/26; B32B3/266; B32B29/00; B32B2250/00; B32B2250/03; B32B2262/00; B32B2262/06; B32B2262/062; B32B2305/00; B32B2305/02; B32B2305/026; Y; Y10; Y10T; Y10T428/00; Y10T428/14; Y10T428/24; Y10T428/24273; Y10T428/24322; Y10T428/24331; Y10T428/28; Y10T428/2848; Y10T428/31504; Y10T428/31971; Y10T428/31993
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
171 words
A product for use in chemical working operations, for instance, pipetting, wherein at least one device, such as a pipette, is moved between, inserted into and withdrawn from the openings into a plurality of liquid containers arranged in a row with the product preventing undesirable transfer of liquid between the liquid containers, wherein the product comprises a strip-like member for covering the openings into the liquid containers, and said strip-like member includes a layer of absorbent material having the ability to wipe off and clean the exterior of the device when it penetrates the strip-like member, a supporting layer attached to said layer of absorbent material and said supporting layer having spaced apertures arranged to register with the openings into the liquid containers with the layer of absorbent material spanning the apertures, said supporting layer having a first surface in contact with the layer of absorbent material and an oppositely directed second surface, and a pressure-sensitive adhesive deposited on the second surface for attaching said strip-like member to the liquid containers.
Claim 2
Dependent Claim
171 words
A product for use in chemical working operations, for instance, pipetting, wherein at least one device, such as a pipette, is moved between, inserted into and withdrawn from the openings into a plurality of liquid containers arranged in a row with the product preventing undesirable transfer of liquid between the liquid containers, wherein the product comprises a strip-like member for covering the openings into the liquid containers, and said strip-like member includes a layer of absorbent material having the ability to wipe off and clean the exterior of the device when it penetrates the strip-like member, a supporting layer attached to said layer of absorbent material and said supporting layer having spaced apertures arranged to register with the openings into the liquid containers with the layer of absorbent material spanning the apertures, said supporting layer having a first surface in contact with the layer of absorbent material and an oppositely directed second surface, and a pressure-sensitive adhesive deposited on the second surface for attaching said strip-like member to the liquid containers.
Claim 3
Dependent Claim
17 words
A product according to claim 1, wherein the layer of absorbent material consists of fibers of cellulose.
Claim 4
Dependent Claim
16 words
A product according to claim 1, wherein the layer of absorbent material consists of porous paper.
Claim 5
Dependent Claim
37 words
A product according to claim 1, wherein the apertures in said supporting layer have an oval shape with the longitudinal axis of the oval shaped apertures oriented in the direction of the row of the liquid containers.
Claim 6
Dependent Claim
29 words
A product according to claim 1, wherein a removable protective layer is attached to and forms a cover over the adhesive on the second surface of said supporting layer.
Claim 7
Dependent Claim
29 words
A product according to claim 1, wherein said layer of absorbent material comprises at least two separate layers with each said separate layer being formed of a different material.
Claim 8
Dependent Claim
33 words
A product according to claim 6, wherein said separate layers of said layer of absorbent material comprises at least one layer of porous paper and at least one layer of a film material.
Claim 9
Dependent Claim
33 words
A product according to claim 6, wherein said separate layers of said layer of absorbent material comprises at least one layer of porous paper and at least one layer of a non-woven material.
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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) | 1979-12-28 | 1980-06-28 | 1980-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-12-28 | 1984-06-28 | 1984-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-12-28 | 1988-06-28 | 1988-12-28 | $7700.00 | Window Closed / Lapsed |