Patent US3772052A successfully refreshed from Google Patents.
US3772052A
Expired / Lapsed
US
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Recording sheet and color developer therefor
Assignee: Fujifilm Holdings Corp
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Filing: 1971-10-26
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Granted: 1973-11-13
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Expires: 1991-10-26
Abstract
Abstract A recording sheet comprising a support having coated thereon a layer of color developer comprising a metal compound of a polymer, said polymer being a reaction product of an aromatic carboxylic acid with an aldehyde or acetylene, said color developer being capable of forming a distinct color when contacted with a color former.
Inventors
- 👤 S Kimura
- 👤 S Ishige
- 👤 H Kato
- 👤 T Hayashi
- 👤 A Miyamoto
- 👤 H Matsukawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:32
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/124; B41M5/132; B41M5/155; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/256; Y10T428/258; Y10T428/27; Y10T428/273; Y10T428/277; Y10T428/31504; Y10T428/31942; Y10T428/31949; Y10T428/31964
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
27 words
The recording sheet of claim 1 wherein said polymer is a salicylic acid-aldehyde polymer, a p-hydroxybenzoic acid-aldehyde polymer, a 2,6-dihydroxy-benzoic acid-aldehyde polymer or a salicylic acid-acetylene polymer.
Claim 2
Dependent Claim
15 words
The recording sheet of claim 1 wherein said color developer further contains an inorganic pigment.
Claim 3
Dependent Claim
21 words
The recording sheet of claim 1 wherein said color developer further contains an organic carboxylic acid or a metal compound thereof.
Claim 4
Dependent Claim
19 words
The recording sheet of claim 1 wherein said metal is selected from the group consisting of copper and silver.
Claim 5
Dependent Claim
19 words
The recording sheet of claim 1 wherein said metal is selected from the group consisting of magnesium and calcium.
Claim 6
Dependent Claim
20 words
The recording sheet of claim 1 wherein said metal is selected from the group consisting of zinc, cadmium and mercury.
Claim 7
Dependent Claim
19 words
The recording sheet of claim 1 wherein said metal is selected from the group consisting of aluminum and gallium.
Claim 8
Dependent Claim
19 words
The recording sheet of claim 1 wherein said metal is selected from the group consisting of tin and lead.
Claim 9
Dependent Claim
19 words
The recording sheet of claim 1 wherein said metal is selected from the group consisting of chromium and molybdenum.
Claim 10
Dependent Claim
11 words
The recording sheet of claim 1 wherein said metal is manganese.
Claim 11
Dependent Claim
19 words
The recording sheet of claim 1 wherein said metal is selected from the group consisting of chromium and nickel.
Claim 12
Dependent Claim
21 words
The recording sheet of claim 1 wherein said metal is selected from the group consisting of zinc, tin, aluminum and nickel.
Claim 13
Dependent Claim
35 words
The recording sheet of claim 1 wherein said metal compound of said polymer is prepared by reacting an alkali metal salt of said polymer with an inorganic acid or organic acid salt of said metal.
Claim 14
Dependent Claim
26 words
The recording sheet of claim 1 wherein said color former is coated onto the same side of said support as said layer of said color developer.
Claim 15
Dependent Claim
26 words
The recording sheet of claim 1 wherein said color former is coated onto the opposite side of said support from said layer of said color developer.
Claim 16
Dependent Claim
29 words
The recording sheet of claim 1 wherein said color former is coated onto a second support different from the support having coated thereon said layer of said color developer.
Claim 17
Dependent Claim
35 words
The recording sheet of claim 3 wherein said inorganic pigment is present in an amount of greater than 1 part by weight based on 100 parts by weight of said metal compound of said polymer.
Claim 18
Dependent Claim
36 words
The recording sheet of claim 18 wherein said inorganic pigment is present in an amount of from 10 to 1000 parts by weight based on 100 parts by weight of said metal compound of said polymer.
Claim 19
Dependent Claim
25 words
The recording sheet of claim 1 wherein said layer of said color developer comprises said metal compound of said polymer dispersed in a binder therefor.
Claim 20
Dependent Claim
32 words
The recording sheet of claim 1 wherein said layer of said color developer is coated onto said support in an amount of greater than 0.1 gram per square meter of said support.
Claim 21
Dependent Claim
33 words
The recording sheet of claim 21 wherein said layer of said color developer is coated onto said support in an amount of from 0.5 to 5 grams per square meter of said support.
Claim 22
Dependent Claim
52 words
The recording sheet of claim 4 wherein said organic carboxylic acid has at least 6 carbon atoms and wherein said metal compound thereof comprises a metallic salt thereof, said metal being selected from the group consisting of sodium, lithium, potassium, magnesium, calcium, zinc, cadmium, aluminum, tin, lead, chromium, manganese, cobalt, and nickel.
Claim 23
Dependent Claim
38 words
The recording sheet of claim 23 wherein said organic carboxylic acid or said metal compound thereof is present in an amount of greater than 10 parts by weight based on 100 parts by weight of said color developer.
Claim 24
Dependent Claim
39 words
The recording sheet of claim 24 wherein said organic carboxylic acid or said metal compound thereof is present in an amount of from 20 to 200 parts by weight based on 100 parts by weight of said color developer.
References Cited (Backward Citations)
CA772544A
Cited
US2910377A
Cited
US3260613A
Cited
US3287154A
Cited
US3619238A
Cited
US3682680A
Cited
US3682673A
Cited
US3681390A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |