Patent US1528263A successfully refreshed from Google Patents.
Patent US4070912A successfully refreshed from Google Patents.
US4070912A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature indicating compositions and devices
Assignee: Individual
•
Filing: 1975-10-01
•
Granted: 1978-01-31
•
Expires: 1995-10-01
Abstract
Abstract Polymeric mixtures of a cholesterol material and a monomer are disclosed which can advantageously be utilized for the construction of temperature indicating devices. Each polymeric composition exhibits a color at temperatures below a fixed threshold temperature and then appears colorless at the threshold temperature. This characteristic permits safe, compact, accurate, fast responsive, disposable temperature indicating and warning devices to be made.
Inventors
- 👤 Thomas J. McNaughtan, deceased
- 👤 executor by Jerry McClintock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:56
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/36; C09D; C09D5/00; C09D5/26; C09K19/52; C09K19/54; G; G01; G01K; G01K11/00; G01K11/12; G01K11/16; G01K11/165; G01K13/00; G01K13/20; C09K2323/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
56 words
A printable composition comprising a polymeric material dissolved in petroleum ether, said polymeric material being formed by heating a cholesteryl ester material comprising cholesteryl acetate with a thermoplastic ester of dimeric resin acid and pentaerythritol at a temperature of 150° C until no further acetic acid is formed and the oily liquid changes to a solid.
Claim 2
Dependent Claim
56 words
A printable composition comprising a polymeric material dissolved in petroleum ether, said polymeric material being formed by heating a cholesteryl ester material comprising cholesteryl acetate with a thermoplastic ester of dimeric resin acid and pentaerythritol at a temperature of 150° C until no further acetic acid is formed and the oily liquid changes to a solid.
Claim 3
Dependent Claim
24 words
The printable composition of claim 1 in which cholesteryl propionate is added to the cholesteryl acetate prior to the formation of the polymeric material.
Claim 4
Dependent Claim
76 words
A temperature indicating device comprising temperature sensitive materials applied to a substrate to form a plurality of markings thereon, each marking having a different temperature sensitivity, said temperature sensitive materials being formed by heating cholesteryl acetate with a thermoplastic ester of dimeric resin acid and pentaerythritol in the presence of varying amounts of cholesteryl propionate at a temperature of 150° C until no further acetic acid is formed and the oily liquid changes to a solid.
Claim 5
Dependent Claim
76 words
A temperature indicating device comprising temperature sensitive materials applied to a substrate to form a plurality of markings thereon, each marking having a different temperature sensitivity, said temperature sensitive materials being formed by heating cholesteryl acetate with a thermoplastic ester of dimeric resin acid and pentaerythritol in the presence of varying amounts of cholesteryl propionate at a temperature of 150° C until no further acetic acid is formed and the oily liquid changes to a solid.
Claim 6
Dependent Claim
34 words
The temperature indicating device of claim 3 wherein the substrate is polyvinyl chloride and wherein a protective layer of substantially transparent plastic film covers the temperature sensitive materials which are applied to the substrate.
Claim 7
Dependent Claim
113 words
The process of preparing a temperature sensitive device comprising a substrate, a temperature sensitive composition applied to at least one surface of the substrate and a transparent protective covering over the temperature sensitive composition, which process comprises preparing a printable composition comprising a polymeric material dissolved in petroleum ether wherein said polymeric material is formed by heating a cholesteryl ester material comprising cholesteryl acetate with a thermoplastic ester of dimeric resin acid and pentaerythritol at a temperature of 150° C until no further acetic acid is formed and the oily liquid changes to a solid, applying the printable composition to the substrate and covering the temperature sensitive composition with a transparent protective coating.
Claim 8
Dependent Claim
113 words
The process of preparing a temperature sensitive device comprising a substrate, a temperature sensitive composition applied to at least one surface of the substrate and a transparent protective covering over the temperature sensitive composition, which process comprises preparing a printable composition comprising a polymeric material dissolved in petroleum ether wherein said polymeric material is formed by heating a cholesteryl ester material comprising cholesteryl acetate with a thermoplastic ester of dimeric resin acid and pentaerythritol at a temperature of 150° C until no further acetic acid is formed and the oily liquid changes to a solid, applying the printable composition to the substrate and covering the temperature sensitive composition with a transparent protective coating.
Claim 9
Dependent Claim
23 words
The process of claim 5 in which cholesteryl propionate is added to the cholesteryl acetate prior to the formation of the polymeric material.
References Cited (Backward Citations)
US3600060A
Cited
US3620889A
Cited
US3885982A
Cited
US3619254A
Cited
US3576761A
Cited
US3617374A
Cited
US3633425A
Cited
US3661142A
Cited
US3826141A
Cited
US3871232A
Cited
US3898354A
Cited
US3974317A
Cited
US3969264A
Cited
US3929021A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-01-30 | 1981-08-01 | 1982-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-30 | 1985-08-01 | 1986-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-30 | 1989-08-01 | 1990-01-31 | $7700.00 | Window Closed / Lapsed |