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US3661142A
Expired / Lapsed
US
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Temperature-sensing patch
Assignee: SHARN Inc 5700 MEMORIAL HWY STE 202D TAMPA FL A CORP
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Filing: 1970-02-05
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Granted: 1972-05-09
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Expires: 1990-02-05
Abstract
Abstract This temperature-sensing patch comprises a flexible backing web having a pressure-sensitive adhesive coated on one side and a plurality of discrete temperature-sensitive, color-responsive indicators adhered on the other side thereof. Each of the indicators comprises a layer of encapsulated liquid crystals which change in color responsive to temperature changes within a predetermined temperature range.
Inventors
- 👤 Eric Flam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:25
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/01; A61B5/015; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/21; Y10T428/28
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
15 words
The temperature-sensing patch of claim 1 wherein the predetermined temperature range of each indicator differs.
Claim 2
Dependent Claim
15 words
The temPerature-sensing patch of claim 2 wherein the predetermined temperature range of adjacent indicators overlap.
Claim 3
Dependent Claim
18 words
The temperature-sensing patch of claim 1 wherein the adjacent indicators are separated by a border of contrasting color.
Claim 4
Dependent Claim
25 words
The temperature-sensing indicator of claim 1 wherein said backing web is circular and said indicators are disposed in spaced pie-shaped sectors about the center thereof.
Claim 5
Dependent Claim
25 words
The temperature-sensing patch of claim 5 wherein said web is substantially black in color and the spaces between adjacent indicators are substantially white in color.
Claim 6
Dependent Claim
15 words
The temperature-sensing patch of claim 1 including an overlying substantially-transparent flexible covering for said indicators.
Claim 7
Dependent Claim
16 words
The temperature-sensing patch of claim 7 wherein said covering comprises a transparent plastic film adhered thereto.
Claim 8
Dependent Claim
14 words
The temperature-sensing patch of claim 7 wherein said covering comprises a clear lacquer coating.
Claim 9
Dependent Claim
28 words
The temperature-sensing patch of claim 1 wherein the encapsulated liquid crystals of each indicator contain a plasticizer to enhance conformability of each indicator to said flexible backing web.
Claim 10
Dependent Claim
11 words
The temperature-sensing patch of claim 10 wherein said plasticizer comprises glycerol.
Claim 11
Dependent Claim
17 words
The temperature-sensing patch of claim 1 wherein said flexible backing web comprises a black polyvinyl chloride film.
Claim 12
Dependent Claim
14 words
The temperature-sensing patch of claim 1 wherein said pressure-sensitive adhesive is an acrylate-type adhesive.
Claim 13
Dependent Claim
25 words
The temperature-sensing patch of claim 1 including a primer coating on said other side thereof to increase the adhesion of said indicators to said web.
Claim 14
Dependent Claim
16 words
The temperature-sensing patch of claim 14 wherein the primer coating comprises a dried latex colloidal suspension.
Claim 15
Dependent Claim
19 words
The temperature-sensing patch of claim 1 including a peelable facing material covering the exposed surfaces of said pressure-sensitive adhesive.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |