US3727066A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Probe photometer with fluid sensing device
Assignee: Baxter International Inc
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Filing: 1970-05-01
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Granted: 1973-04-10
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Expires: 1990-05-01
Abstract
Abstract The invention is concerned with an improved probe-type of photometer, the probe of which may be inserted directly into a liquid or gas, to measure the light transmission through the fluid; and which may be used, for example, for spectrophotometric, turbidity, colorimetric, densitometer, or other measurements.
Inventors
- 👤 A Louderback
- 👤 R Owen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:48
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/84; G01N21/85; G01N21/8507
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
141 words
A probe for use with a photometer apparatus, said probe comprising an elongated, rigid substantially tubular member including an open recess between its ends to define a pair of spaced apart, transparent surfaces, a radiation sensing device mounted in said tubular member and positioned adjacent one of said surfaces and an elongated radiation transmission element positoned within and extending longitudinally of said tubular member to a position adjacent the other of said surfaces for passing radiation from a source remote from said other surface to said other surface to radiate between said surfaces and activate said radiation sensing device in a manner responsive to the radiation absorbing characteristics of a fluid located between said surfaces and a fluid sensing device mounted in said probelike member adjacent said other surface thereby to provide indication that said surfaces are immersed in said fluid.
Claim 2
Dependent Claim
141 words
A probe for use with a photometer apparatus, said probe comprising an elongated, rigid substantially tubular member including an open recess between its ends to define a pair of spaced apart, transparent surfaces, a radiation sensing device mounted in said tubular member and positioned adjacent one of said surfaces and an elongated radiation transmission element positoned within and extending longitudinally of said tubular member to a position adjacent the other of said surfaces for passing radiation from a source remote from said other surface to said other surface to radiate between said surfaces and activate said radiation sensing device in a manner responsive to the radiation absorbing characteristics of a fluid located between said surfaces and a fluid sensing device mounted in said probelike member adjacent said other surface thereby to provide indication that said surfaces are immersed in said fluid.
Claim 3
Dependent Claim
145 words
Photometer apparatus for measuirng the absorption of radiation in a fluid having a probe comprising an elongated, rigid substantially tubular member including an open recess between its ends to define a pair of spaced apart, transparent surfaces, a radiation sensing device mounted in said tubular member and positioned adjacent one of said surfaces and an elongated radiation transmission element positioned within and extending longitudinally of said tubular member to a position adjacent the other of said surfaces for passing radiation from a source remote from said other surface to said other surface to radiate between said surfaces and activate said radiation sensing device in a manner responsive to the radiation absorbing characteristics of said fluid located between said surfaces and a fluid sensing device mounted in said probe-like member adjacent said other surface thereby to provide indication that said surfaces are immersed in said fluid.
Claim 4
Dependent Claim
145 words
Photometer apparatus for measuirng the absorption of radiation in a fluid having a probe comprising an elongated, rigid substantially tubular member including an open recess between its ends to define a pair of spaced apart, transparent surfaces, a radiation sensing device mounted in said tubular member and positioned adjacent one of said surfaces and an elongated radiation transmission element positioned within and extending longitudinally of said tubular member to a position adjacent the other of said surfaces for passing radiation from a source remote from said other surface to said other surface to radiate between said surfaces and activate said radiation sensing device in a manner responsive to the radiation absorbing characteristics of said fluid located between said surfaces and a fluid sensing device mounted in said probe-like member adjacent said other surface thereby to provide indication that said surfaces are immersed in said fluid.
Claim 5
Dependent Claim
26 words
The photometer apparatus defined in claim 2 and which includes a temperature sensitive device mounted in said tubular member and positioned adjacent said radiation sensing device.
Claim 6
Dependent Claim
21 words
The photometer apparatus defined in claim 2 in which said tubular member is formed of glass and sealed at one end.
Claim 7
Dependent Claim
25 words
The photometer apparatus defined in claim 4 and which includes a plug of a selected plastic material sealing said glass tube at said one end.
Claim 8
Dependent Claim
42 words
The photometer apparatus defined in claim 5 and which includes a plug member mounted on the end of said tubular member remote from said one end, with said radiation transmission element extending through an aperture in the center of said plug member.
Claim 9
Dependent Claim
18 words
The photometer apparatus defined in claim 2 in which said radiation transmission element comprises an elongated light pipe.
Claim 10
Dependent Claim
13 words
The photometer apparatus defined in claim 5 in which said plastic is polytetrafluoroethylene.
Claim 11
Dependent Claim
32 words
The photometer apparatus of claim 2 in which said open recess is located near one end of said elongated member, said one end comprising a plug of plastic material such as polytetrafluoroethylene.
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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) | 1976-04-09 | 1976-10-09 | 1977-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-09 | 1980-10-09 | 1981-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-09 | 1984-10-09 | 1985-04-10 | $7700.00 | Window Closed / Lapsed |