US3915004A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermometers
Assignee: Hoechst AG
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Filing: 1973-04-09
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Granted: 1975-10-28
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Expires: 1993-04-09
Abstract
Abstract This invention relates to a volume expansion thermometer comprising a capillary tube means of a transparent plastic material one end of which tube is open and the other end of which is attached to, and is in communication with, an otherwise closed reservoir for liquid, an expansion body means disposed in the said reservoir, and an indicating liquid means in the reservoir and surrounding said expansion body.
Inventors
- 👤 Bernhard Nollen
- 👤 Klaus Dickhauser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:48
CPC Classifications
G; G01; G01K; G01K5/00; G01K5/28; G01K5/30; G01K13/00; G01K13/20
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
163 words
A volume expansion thermometer comprising a capillary tube of transparent plastic material one end of which tube is open and the other end of which is attached to, and is in communication with, an otherwise closed reservoir for liquid, an expansion body in the reservoir, an indicating liquid in the reservoir and surrounding the expansion body, said capillary tube and reservoir being formed from (a) a strip of plastic material one side of which has a channel along a part only of its length and at least a part of the remaining length of which side adjacent to said channel has a depression, and (b) a base plate adherent to the strip of plastic material thereby to form said reservoir defined by the walls of the depression and by a portion of the base plate, and said capillary being defined by the walls of the channel and a portion of the base plate, said reservoir and capillary being in communication with each other.
Claim 2
Dependent Claim
163 words
A volume expansion thermometer comprising a capillary tube of transparent plastic material one end of which tube is open and the other end of which is attached to, and is in communication with, an otherwise closed reservoir for liquid, an expansion body in the reservoir, an indicating liquid in the reservoir and surrounding the expansion body, said capillary tube and reservoir being formed from (a) a strip of plastic material one side of which has a channel along a part only of its length and at least a part of the remaining length of which side adjacent to said channel has a depression, and (b) a base plate adherent to the strip of plastic material thereby to form said reservoir defined by the walls of the depression and by a portion of the base plate, and said capillary being defined by the walls of the channel and a portion of the base plate, said reservoir and capillary being in communication with each other.
Claim 3
Dependent Claim
44 words
A thermometer as claimed in claim 1 wherein the reservoir is a hollow annulus and wherein the expansion body is a hollow annulus of a resilient material filled with a thermally expansible substance, said latter annulus being disposed substantially concentrically within said former annulus.
References Cited (Backward Citations)
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Cited
US2115501A
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US2633025A
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US3490287A
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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) | 1978-10-27 | 1979-04-28 | 1979-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-27 | 1983-04-28 | 1983-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-27 | 1987-04-28 | 1987-10-28 | $7700.00 | Window Closed / Lapsed |