US4738549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pool thermometer
Assignee: Individual
•
Filing: 1986-04-03
•
Granted: 1988-04-19
•
Expires: 2006-04-03
Abstract
Abstract A thermometer adapted for immersion in a liquid includes a monolithic casing matrix. A plurality of liquid crystal display portions are embedded in the casing matrix. The liquid crystal display portions each have a liquid crystal agent with an optically perceivable condition at a temperature or temperature range. Indicia of the temperature or temperature ranges can also be provided.
Inventors
- 👤 R. Gregory Plimpton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:12
CPC Classifications
G; G01; G01K; G01K11/00; G01K11/12; G01K11/16; G01K11/165; G01K1/00; G01K1/08; G01K13/00
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
74 words
A waterproof thermometer for insertion in a liquid comprising a seamless integrally molded plastic casing having a thin transparent side and a thick side, said casing having a UV attenuator throughout, and a plurality of liquid crystal display portions in said casing, said liquid crystal display portions being visible through said thin side of said casing, and each liquid crystal portion having an optically perceivable condition for indicating a specific temperature or temperature range.
Claim 2
Dependent Claim
74 words
A waterproof thermometer for insertion in a liquid comprising a seamless integrally molded plastic casing having a thin transparent side and a thick side, said casing having a UV attenuator throughout, and a plurality of liquid crystal display portions in said casing, said liquid crystal display portions being visible through said thin side of said casing, and each liquid crystal portion having an optically perceivable condition for indicating a specific temperature or temperature range.
Claim 3
Dependent Claim
23 words
The thermometer of claim 1, wherein said liquid crystal display portions are disposed about a backing, said backing being embedded in said casing.
Claim 4
Dependent Claim
18 words
The thermometer of claim 1, wherein said casing comprises means for optically magnifying said liquid crystal display portions.
Claim 5
Dependent Claim
19 words
The thermometer of claim 3, wherein said magnification means comprises at least one convex surface fashioned into said casing.
Claim 6
Dependent Claim
9 words
The thermometer of claim 1, further comprising flotation means.
Claim 7
Dependent Claim
16 words
The thermometer of claim 5, wherein said flotation means comprises buoyant material affixed to said casing.
Claim 8
Dependent Claim
16 words
The thermometer of claim 5, wherein said flotation means comprises buoyant material embedded within said casing.
Claim 9
Dependent Claim
15 words
The thermometer of claim 1, further comprising structure for positioning said thermometer within a liquid.
Claim 10
Dependent Claim
15 words
The thermometer of claim 8, including positioning means comprised of a bore through said casing.
Claim 11
Dependent Claim
13 words
The thermometer of claim 1, further comprising advertising indicia embedded in said casing.
Claim 12
Dependent Claim
14 words
The thermometer of claim 1, wherein said casing is at least one-eighth inch thick.
Claim 13
Dependent Claim
17 words
The thermometer of claim 1, wherein said liquid crystal display portions are formed from a cholesteric ester.
Claim 14
Dependent Claim
14 words
The thermometer of claim 1, wherein said casing is formed from a polyester resin.
Claim 15
Dependent Claim
19 words
The thermometer of claim 13, wherein said casing is fashioned from unsaturated polyester cured with methyl ethyl ketone peroxide.
Claim 16
Dependent Claim
26 words
The thermometer of claim 1, further comprising indicia of said temperatures or temperature ranges at which said liquid crystal display portions have their optically perceivable condition.
Claim 17
Dependent Claim
10 words
The thermometer of claim 15, wherein said indicia are numerals.
Claim 18
Dependent Claim
110 words
A waterproof thermometer for insertion in a liquid comprising a seamless integral plastic molded casing having a thin side and a thick side and a plurality of liquid crystal display portions in said casing, said liquid crystal display portions being visible through said thin side, and each liquid crystal portion having an optically perceivable condition for indicating a specific temperature or temperature range, said casing being formed by molding a thin casing portion having a UV attenuator and a thick casing portion having a UV attenuator together with said liquid crystal display portions therebetween, said thick and thin portions being cured so as to form a seamless, integral, waterproof casing.
Claim 19
Dependent Claim
110 words
A waterproof thermometer for insertion in a liquid comprising a seamless integral plastic molded casing having a thin side and a thick side and a plurality of liquid crystal display portions in said casing, said liquid crystal display portions being visible through said thin side, and each liquid crystal portion having an optically perceivable condition for indicating a specific temperature or temperature range, said casing being formed by molding a thin casing portion having a UV attenuator and a thick casing portion having a UV attenuator together with said liquid crystal display portions therebetween, said thick and thin portions being cured so as to form a seamless, integral, waterproof casing.
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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) | 1991-04-19 | 1991-10-19 | 1992-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-19 | 1995-10-19 | 1996-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-19 | 1999-10-19 | 2000-04-19 | $7700.00 | Window Closed / Lapsed |