US4981805A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of using chemical analysis slide
Assignee: Fujifilm Holdings Corp
•
Filing: 1984-12-17
•
Granted: 1991-01-01
•
Expires: 2004-12-17
Abstract
Abstract A method of using a chemical analysis slide comprising a slide frame and a sheet-like or film-like chemical analysis element for colorimetric determination of a specific component in an aqueous liquid sample, which comprises applying an aqueous liquid sample to the chemical analysis element, and covering the upper face of the side of the slide frame to which the sample is applied with a sheet-like, plate-like or block or brick-like cover to thereby ensure a space between the chemical analysis element and the cover and to prevent evaporation of water or to control evaporation rate of water.
Inventors
- 👤 Kenichiro Yazawa
- 👤 Masao Kitajima
- 👤 Asaji Kondo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:21
CPC Classifications
B; B01; B01L; B01L3/00; B01L3/50; B01L3/508; G; G01; G01N; G01N21/00; G01N21/84; G01N21/8483; G01N33/00; G01N33/48; G01N33/50; G01N33/52; G01N33/525; G02; G02B; G02B21/00; G02B21/34; B01L2200/00; B01L2200/14; B01L2200/142; B01L2300/00; B01L2300/04; B01L2300/041; B01L2300/046; B01L2300/048; B01L2300/06; B01L2300/069; B01L2300/08; B01L2300/0809; B01L2300/0822; B01L2400/00; B01L2400/04; B01L2400/0403; B01L2400/0406
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
172 words
In a method for the colorimetric determination of a specific component in an aqueous liquid sample by applying the aqueous liquid sample to a chemical analysis element for the colorimetric determination, wherein the chemical analysis element is covered after the sample is applied to prevent the evaporation of water, the improvement comprising: applying a blood sample, as the aqueous liquid sample, to said chemical analysis element, said chemical analysis element being a component of a chemical analysis slide comprised of a slide frame and a sheet-like or film-like chemical analysis element for the colorimetric determination, and covering the upper face of the side of said slide frame which contains the chemical analysis element to which said blood sample is applied with a sheet-like, plate-like or block or brick-like cover to thereby ensure a space between said chemical analysis element and said cover and to either present evaporation of water, or to control the evaporation rate of water, and to control the amount of air or oxygen reaching said aqueous liquid blood sample.
Claim 2
Dependent Claim
172 words
In a method for the colorimetric determination of a specific component in an aqueous liquid sample by applying the aqueous liquid sample to a chemical analysis element for the colorimetric determination, wherein the chemical analysis element is covered after the sample is applied to prevent the evaporation of water, the improvement comprising: applying a blood sample, as the aqueous liquid sample, to said chemical analysis element, said chemical analysis element being a component of a chemical analysis slide comprised of a slide frame and a sheet-like or film-like chemical analysis element for the colorimetric determination, and covering the upper face of the side of said slide frame which contains the chemical analysis element to which said blood sample is applied with a sheet-like, plate-like or block or brick-like cover to thereby ensure a space between said chemical analysis element and said cover and to either present evaporation of water, or to control the evaporation rate of water, and to control the amount of air or oxygen reaching said aqueous liquid blood sample.
Claim 3
Dependent Claim
20 words
The method of claim 1, wherein said cover is a sheet-like material of paper, a synthetic resin film or cloth.
Claim 4
Dependent Claim
13 words
The method of claim 2, wherein said evaporation rate of water is controlled.
Claim 5
Dependent Claim
18 words
The method of claim 1, wherein said cover is a porous material which is both air-permeable and water-impermeable.
Claim 6
Dependent Claim
24 words
The method of claim 1, wherein said cover is partly adhered to the slide frame permitting the cover to be opened and then closed.
Claim 7
Dependent Claim
16 words
The method of claim 1, wherein said cover is a plate-like material of a synthetic resin.
Claim 8
Dependent Claim
12 words
The method of claim 1, wherein said cover is a metal plate.
Claim 9
Dependent Claim
22 words
The method of claim 1, wherein said covering is conducted by placing the cover onto the upper face of the slide frame.
Claim 10
Dependent Claim
22 words
The method of claim 1, wherein said covering is conducted by bonding the cover onto the upper face of the slide frame.
References Cited (Backward Citations)
US2292450A
Cited
US2561339A
Cited
US3814668A
Cited
US3785930A
Cited
US3884641A
Cited
US4176174A
Cited
US3990850A
Cited
US4298571A
Cited
US4256693A
Cited
JPS54162293A
Cited
JPS54162294A
Cited
US4230757A
Cited
JPS5910620A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-12-31 | 1994-07-02 | 1995-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-31 | 1998-07-02 | 1999-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-31 | 2002-07-02 | 2003-01-01 | $7700.00 | Window Closed / Lapsed |