Patent US4021200A successfully refreshed from Google Patents.
US4021200A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic digital radial and electro immunodiffusion calibrating viewer
Assignee: Individual
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Filing: 1975-09-29
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Granted: 1977-05-03
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Expires: 1995-09-29
Abstract
Abstract A viewer, with electronic digital read out display, and calibrated to measure either a radial immunodiffusion or an electrophoresis rocket type protrusion.
Inventors
- 👤 Walter Farris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 07:42
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/416; G01N27/447; G01N27/44704; G01N27/44717; G01N27/44721; G01N33/00; G01N33/48; G01N33/483; G01N33/487; G01N33/49
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
97 words
A device for measuring and displaying the magnitude of an immunodiffusion test, comprising in combination a base member and a top member, said top member having a pair of cross hairs, one of which is stationary and the other of which in moveable, a digital meter panel for indicating relative movement of said moveable cross hair, motor means to move said moveable cross hair, eletrical circuits connected to said motor means, and a potentiometer in said circuits and responsive to the movement of said moveable cross hair for effecting a digital read out on said digital panel.
Claim 2
Independent Claim
97 words
A device for measuring and displaying the magnitude of an immunodiffusion test, comprising in combination a base member and a top member, said top member having a pair of cross hairs, one of which is stationary and the other of which in moveable, a digital meter panel for indicating relative movement of said moveable cross hair, motor means to move said moveable cross hair, eletrical circuits connected to said motor means, and a potentiometer in said circuits and responsive to the movement of said moveable cross hair for effecting a digital read out on said digital panel.
Claim 3
Dependent Claim
37 words
The structure of claim 1, in which said potentiometer is arranged to raise and lower the resistance in said circuits upon the movement of said cross hair, whereby to effect the read out on said digital panel.
Claim 4
Dependent Claim
24 words
The structure of claim 1, including means on said base for transforming and regulating the flow of current through said cicuits and said potentiometer.
Claim 5
Dependent Claim
19 words
The structure of claim 1, including means to effect the forward and reverse movement of said moveable cross hair.
Claim 6
Dependent Claim
31 words
The structure of claim 1, in which there are limit switches in one of said circuits, which switches are actuated by the forward and reverse travel of said moveable cross hair.
Claim 7
Dependent Claim
24 words
The structure of claim 1, including an immunodiffusion plate supported on said top member, and arranged to be scanned by said moveable cross hair.
Claim 8
Dependent Claim
19 words
The structure of claim 6, including means in said circuits for illuminating said immunodiffusion plate and said cross hairs.
Claim 9
Dependent Claim
40 words
The structure of claim 1, in which said cross hairs are carried on supports, one of which is moveable, said last named support being mounted on a threaded arm, and a threaded shaft driven by said motor engaging said arm.
Claim 10
Dependent Claim
53 words
The structure of claim 8, in which said threaded shaft engages said potentiometer to cause an increase or decrease of resistance to the flow of electrical energy through said potentiometer, the variance or resistance being in proportion to the travel of said arm on said shaft and registered on the said digital panel.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-02 | 1980-11-01 | 1981-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-02 | 1984-11-01 | 1985-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-02 | 1988-11-01 | 1989-05-03 | $7700.00 | Window Closed / Lapsed |