Patent US3924049A successfully refreshed from Google Patents.
US3924049A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multicolor thermosensitive paper
Assignee: Texas Instruments Inc
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Filing: 1973-07-30
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Granted: 1975-12-02
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Expires: 1993-07-30
Abstract
Abstract A multicolor thermally sensitive paper having a supporting substrate with a first coat of material normally of a first color reacting in response to a given quantity of heat to turn into a contrasting color with a second coat overlaying the first coat in the form of an opaque blush coat thermally adapted to be transparentized in response to a quantity of heat lower than the given quantity.
Inventors
- 👤 James K Truitt
- 👤 Robert C Goodman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:49
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/34; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10S430/00; Y10S430/165; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/31504; Y10T428/31971; Y10T428/31975; Y10T428/31978; Y10T428/31982
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
67 words
A HEAT SENSITIVE, SHEET MATERIAL, COMPRISING: A. A SUPPORTING SUBSTRATE; B. A FIRST LAYER OF A FIRST COLOR OF HEAT ACTUABLE MATERIAL, RESPONSIVE TO A FIRST QUANTITY OF HEAT TO CHANGE TO A SECOND COLOR; AND C. A SECOND LAYER OF A NORMALLY SUBSTANTIALLY OPAQUE COAT OVERLAYING THE FIRST LAYER, RESPONSIVE TO A SECOND QUANTITY OF HEAT LESS THAN THE FIRST QUANTITY OF HEAT TO BE TRANSPARENTIZED.
Claim 2
Dependent Claim
67 words
A HEAT SENSITIVE, SHEET MATERIAL, COMPRISING: A. A SUPPORTING SUBSTRATE; B. A FIRST LAYER OF A FIRST COLOR OF HEAT ACTUABLE MATERIAL, RESPONSIVE TO A FIRST QUANTITY OF HEAT TO CHANGE TO A SECOND COLOR; AND C. A SECOND LAYER OF A NORMALLY SUBSTANTIALLY OPAQUE COAT OVERLAYING THE FIRST LAYER, RESPONSIVE TO A SECOND QUANTITY OF HEAT LESS THAN THE FIRST QUANTITY OF HEAT TO BE TRANSPARENTIZED.
Claim 3
Dependent Claim
53 words
The heat sensitive sheet material of claim 1 wherein the first layer comprises a material having a dye dispersed therein to provide the first color, the material being responsive to the application of the first quantity of heat to change to a color which combines with the dye to provide the second color.
Claim 4
Dependent Claim
17 words
The heat sensitive sheet material of claim 1 wherein the supporting substrate is a paper base layer.
Claim 5
Dependent Claim
80 words
A heat sensitive sheet material comprising: a. a supporting substrate; b. a first layer of a material of a first color overlaying the substrate; c. a second layer of a normally substantially opaque coat overlaying the first layer, responsive to a first quantity of heat to be transparentized; and d. a third layer of a normally substantially opaque coat overlaying the second layer, responsive to a second quantity of heat less than the first quantity of heat to be transparentized.
Claim 6
Dependent Claim
80 words
A heat sensitive sheet material comprising: a. a supporting substrate; b. a first layer of a material of a first color overlaying the substrate; c. a second layer of a normally substantially opaque coat overlaying the first layer, responsive to a first quantity of heat to be transparentized; and d. a third layer of a normally substantially opaque coat overlaying the second layer, responsive to a second quantity of heat less than the first quantity of heat to be transparentized.
Claim 7
Dependent Claim
17 words
The heat sensitive sheet material of claim 4 wherein the supporting substrate is a paper base layer.
Claim 8
Independent Claim
61 words
A method of forming a heat sensitive sheet material comprising the steps of: a. preparing a color formulation of a first color that is changeable to a second color upon application of heat; b. applying the formulation to a supporting substrate; and c. applying a substantially opaque blush coat solution over the formulation, the solution becoming transparent upon application of heat.
Claim 9
Independent Claim
61 words
A method of forming a heat sensitive sheet material comprising the steps of: a. preparing a color formulation of a first color that is changeable to a second color upon application of heat; b. applying the formulation to a supporting substrate; and c. applying a substantially opaque blush coat solution over the formulation, the solution becoming transparent upon application of heat.
Claim 10
Dependent Claim
19 words
The method of claim 6 having the additional step of drying the formulation after applying it to the substrate.
Claim 11
Dependent Claim
13 words
The method of claim 7 wherein the substrate is a paper base layer.
Claim 12
Independent Claim
83 words
The method of forming a heat sensitive sheet material comprising the steps of: a. preparing a formulation of a first color b. applying the formulation to a supporting substrate; c. applying a first substantially opaque blush solution to the formulation, the solution becoming transparent upon application of a first amount of heat; and d. applying a second substantially opaque blush solution over the first solution, the second solution becoming transparent upon application of a second amount of heat, less than the first amount.
Claim 13
Independent Claim
83 words
The method of forming a heat sensitive sheet material comprising the steps of: a. preparing a formulation of a first color b. applying the formulation to a supporting substrate; c. applying a first substantially opaque blush solution to the formulation, the solution becoming transparent upon application of a first amount of heat; and d. applying a second substantially opaque blush solution over the first solution, the second solution becoming transparent upon application of a second amount of heat, less than the first amount.
Claim 14
Dependent Claim
14 words
The method of claim 9 wherein the supporting substrate is a paper base sheet.
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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) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |