US3864976A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reusable bottle thermometer
Assignee: PARKER RESEARCH ROBERT
•
Filing: 1973-10-31
•
Granted: 1975-02-11
•
Expires: 1993-10-31
Abstract
Abstract A laminated digital thermometer is provided for determining the temperature of a fluid in a container. A digital thermometer strip is employed having a thin dimensionally stable plastic film upon which is printed a dark mask, leaving alpha-numeric symbols transparent. Coated onto the transparent areas are liquid crystal compositions having transition temperatures appropriately related to the alpha-numeric designation. The liquid crystal layer is then coated with a dark backing. The digital thermometer strip is introduced between two films of water impermeable plastic which extend beyond the periphery of the strip and which are sealed together to provide a water impermeable barrier. In a preferred embodiment, an efficient heat exchanging strip is secured to the liquid crystal surface under the protective film. Means for securing the composite laminate in good heat exchanging relationship with a surface is secured to the composite.
Inventors
- 👤 Robert Parker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:00
CPC Classifications
A; A61; A61J; A61J9/00; A61J9/02
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
164 words
As an article of manufacture, a digital thermometer comprising a laminate sandwich having: a digital thermometer strip of a transparent base film, a dark mask painted on said base strip leaving transparent areas of alpHa-numeric symbols, a plurality of liquid crystal compositions coated over said mask forming a substantially uniform layer, wherein each alpha-numeric designation is covered with a liquid crystal composition having a transition range associated with the alpha-numeric symbol, and a black film backing on said liquid crystal composition layer; an inner film and an outer film of greater cross-sectional dimension than said thermometer strip, wherein each of said films are water impermeable and said outer film is substantially thicker than said inner film, with said inner and outer films heat bonded together to form an envelope containing said digital thermometer strip, whose edges extend substantially beyond the periphery of said thermometer strip; and means affixed to said envelope for securing the inner film in good heat exchanging relationship to a surface.
Claim 2
Dependent Claim
164 words
As an article of manufacture, a digital thermometer comprising a laminate sandwich having: a digital thermometer strip of a transparent base film, a dark mask painted on said base strip leaving transparent areas of alpHa-numeric symbols, a plurality of liquid crystal compositions coated over said mask forming a substantially uniform layer, wherein each alpha-numeric designation is covered with a liquid crystal composition having a transition range associated with the alpha-numeric symbol, and a black film backing on said liquid crystal composition layer; an inner film and an outer film of greater cross-sectional dimension than said thermometer strip, wherein each of said films are water impermeable and said outer film is substantially thicker than said inner film, with said inner and outer films heat bonded together to form an envelope containing said digital thermometer strip, whose edges extend substantially beyond the periphery of said thermometer strip; and means affixed to said envelope for securing the inner film in good heat exchanging relationship to a surface.
Claim 3
Dependent Claim
24 words
An article of manufacture according to claim 1, wherein said means for securing is an elastic band attached to opposite ends of said envelope.
Claim 4
Dependent Claim
21 words
An article of manufacture according to claim 2, wherein intermediate said thermometer strip and inner film is a thin metallic film.
Claim 5
Dependent Claim
17 words
An article of manufacture according to claim 3, wherein said metallic film is aluminum, iron or copper.
Claim 6
Dependent Claim
20 words
An article of manufacture according to claim 1, wherein said securing means is an adhesive adhered to said inner film.
Claim 7
Dependent Claim
182 words
As an article of manufacture, a digital thermometer comprising a laminate sandwich having: a digital thermometer strip of a rectangular transparent base film, a dark mask painted on said base strip leaving transparent areas of numerical symbols in a linear array along the long dimension of said film, a plurality of liquid crystal compositions coated over said mask forming a substantially uniform layer, wherein each numerical designation is covered with a liquid crystal composition having a transition range associated with said numerical symbol, and a black film backing on said liquid crystal composition layer; an inner film of from about 0.5 to 3 mils in thickness having an inner heat sealable layer and an outer water impermeable layer and an outer film of from about 4 to 10 mils in thickness having an inner heat sealable layer and an outer water impermeable layer, wherein said inner and outer films are heat sealed together to form a water impermeable envelope about said digital thermometer strip; and resilient means affixed to opposite ends of said envelope for securing the digital thermometer to a container.
Claim 8
Dependent Claim
182 words
As an article of manufacture, a digital thermometer comprising a laminate sandwich having: a digital thermometer strip of a rectangular transparent base film, a dark mask painted on said base strip leaving transparent areas of numerical symbols in a linear array along the long dimension of said film, a plurality of liquid crystal compositions coated over said mask forming a substantially uniform layer, wherein each numerical designation is covered with a liquid crystal composition having a transition range associated with said numerical symbol, and a black film backing on said liquid crystal composition layer; an inner film of from about 0.5 to 3 mils in thickness having an inner heat sealable layer and an outer water impermeable layer and an outer film of from about 4 to 10 mils in thickness having an inner heat sealable layer and an outer water impermeable layer, wherein said inner and outer films are heat sealed together to form a water impermeable envelope about said digital thermometer strip; and resilient means affixed to opposite ends of said envelope for securing the digital thermometer to a container.
Claim 9
Dependent Claim
25 words
An article of manufacture according to claim 6, wherein intermediate said thermometer strip and inner film is a thin film of aluminum, iron or copper.
Claim 10
Dependent Claim
16 words
An article of manufacture according to claim 6, wherein said resilient means is an elastic band.
Claim 11
Dependent Claim
22 words
An article of manufacture according to claim 5, wherein said inner layers are atactic polyethylene and said outer layers are polyethylene terephthalate.
References Cited (Backward Citations)
US3440882A
Cited
US3661142A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-10 | 1978-08-12 | 1979-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-10 | 1982-08-12 | 1983-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-10 | 1986-08-12 | 1987-02-11 | $7700.00 | Window Closed / Lapsed |