US3829217A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil condition indicator
Assignee: Individual
•
Filing: 1973-04-09
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Granted: 1974-08-13
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Expires: 1993-04-09
Abstract
Abstract Means for indicating the condition of engine lubricating oil including a pair of relatively movable members defining therebetween a progressively increasing-in-thickness space for holding a sample of the oil. At least one of the members is made to be light-transmitting and indicium means are associated with the indicator for correlation with the progressively increasing opacity of the oil sample to provide an oil indicating condition to the user viewing the oil sample in the indicating means.
Inventors
- 👤 C Johnson
- 👤 A Kimmel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:53
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/25; G01N21/29; G01N21/293; G01N33/00; G01N33/26; G01N33/28; G01N33/2888
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
185 words
Throw-away means for indicating the condition of engine lubricating oil, comprising: a base member formed of low cost substantially nonfrangible sheet material; a light-transmitting substantially nonfrangible synthetic plastic flat cover member overlying said base member, said base member defining a well opening toward the cover member and having a progressively increasing depth for holding a corresponding progressively increasing-in-depth sample of the lurbicating oil therein, said well further opening flush to one edge of said cover member at a maximum depth portion thereof and terminating short of the opposite edge of said base member, said one edge of the cover member being congruent with the corresponding edge of said base member laterally of said well; and indicium means associated with said base meMber viewable through said cover member and oil sample to an extent controlled by the opacity of the lubricating oil sample thereat thereby to indicate the condition of the oil as a function of said opacity, said base member having a substantial extent between said well and said opposite edge thereof and being adapted to carry wording thereon for providing information to the user.
Claim 2
Dependent Claim
185 words
Throw-away means for indicating the condition of engine lubricating oil, comprising: a base member formed of low cost substantially nonfrangible sheet material; a light-transmitting substantially nonfrangible synthetic plastic flat cover member overlying said base member, said base member defining a well opening toward the cover member and having a progressively increasing depth for holding a corresponding progressively increasing-in-depth sample of the lurbicating oil therein, said well further opening flush to one edge of said cover member at a maximum depth portion thereof and terminating short of the opposite edge of said base member, said one edge of the cover member being congruent with the corresponding edge of said base member laterally of said well; and indicium means associated with said base meMber viewable through said cover member and oil sample to an extent controlled by the opacity of the lubricating oil sample thereat thereby to indicate the condition of the oil as a function of said opacity, said base member having a substantial extent between said well and said opposite edge thereof and being adapted to carry wording thereon for providing information to the user.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |