Patent US471848A successfully refreshed from Google Patents.
Patent US3744907A successfully refreshed from Google Patents.
US3744907A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid tester
Assignee: Individual
•
Filing: 1972-02-04
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Granted: 1973-07-10
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Expires: 1992-02-04
Abstract
Abstract An article for receiving a small sample of liquid and holding the sample in a chamber of predetermined shape so that indicia on the bottom of said chamber can be viewed through the liquid and thereby used to accurately determine the level of contamination of the sample.
Inventors
- 👤 P Whelan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:51
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/25; G01N21/29
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
109 words
An article for testing liquid for undissolved materials comprising a body an elongate depression on one surface of said body, indicia means carried in said depression, said indicia means being below said surface of said body so that when liquid substantially fills said depression, said indicia means is submerged in said liquid, said indicia means comprises a plurality of projections extending transversely to the long axis of said depression, said projections being spaced apart and having their upper surface intermediate the bottom of said depression and said surface of said body, each upper surface of each indicia means being at a different depth below said surface of said body.
Claim 2
Dependent Claim
109 words
An article for testing liquid for undissolved materials comprising a body an elongate depression on one surface of said body, indicia means carried in said depression, said indicia means being below said surface of said body so that when liquid substantially fills said depression, said indicia means is submerged in said liquid, said indicia means comprises a plurality of projections extending transversely to the long axis of said depression, said projections being spaced apart and having their upper surface intermediate the bottom of said depression and said surface of said body, each upper surface of each indicia means being at a different depth below said surface of said body.
Claim 3
Dependent Claim
75 words
An article according to claim 1, wherein said depression slopes downwardly from one end to another along the long axis thereof and has a plurality of raised bars having progressively lower upper surfaces from the upper end to the lower end of said depression thereon as indicia means, and said depression is sized so as to be substantially filled by the amount of oil commonly found on the dipstick of of a motor vehicle engine.
Claim 4
Dependent Claim
32 words
An article according to claim 1 having a member through which said indicia means are visible, extending over said depression, said member forming the upper surface of any liquid filling said depression.
Claim 5
Dependent Claim
32 words
An article according to claim 2 having a member through which said indicia means are visible, extending over said depression, said member forming the upper surface of any liquid filling said depression.
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) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |