US3914522A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyolefin-coated photographic carrier material
Assignee: Felex Schoeller Jr and GmbH and Co KG
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Filing: 1974-02-20
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Granted: 1975-10-21
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Expires: 1994-02-20
Abstract
Abstract A polyolefin-coated photographic paper coated with a crystallized coating of calcium, magnesium, zinc or lead fluoride or mixtures thereof, silicic acid and a matting agent is disclosed. The crystallized coating is receptive to hydrophilic substances and diminishes the hydrophobic nature of the polyolefin coating.
Inventors
- 👤 Eckehard Saverin
- 👤 Jorg Zimmermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:18
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/95; G03C1/775; G03C1/79; G03C1/91; G03C1/915; Y; Y10; Y10S; Y10S430/00; Y10S430/151; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31899; Y10T428/31902
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
35 words
A POLYOLEFIN COATED PHOTOGRAPHIC CARRIER PAPER RECEPTIVE TO HYDROPHILIC SUBSTANCES, WHEREIN SAID POLYOLEFIN IS COATED WITH A CRYSTALLIZED COATING COMPRISING CALCUIM, MAGNESIUM, ZINC OR LEAD FLUORIDE OR MIXTURES THEREOF, SILICIC ACID AND A MATTING AGENT.
Claim 2
Dependent Claim
35 words
A POLYOLEFIN COATED PHOTOGRAPHIC CARRIER PAPER RECEPTIVE TO HYDROPHILIC SUBSTANCES, WHEREIN SAID POLYOLEFIN IS COATED WITH A CRYSTALLIZED COATING COMPRISING CALCUIM, MAGNESIUM, ZINC OR LEAD FLUORIDE OR MIXTURES THEREOF, SILICIC ACID AND A MATTING AGENT.
Claim 3
Dependent Claim
16 words
A photographic carrier according to claim 1 which includes in said crystallized coating an anti-static agent.
Claim 4
Dependent Claim
23 words
A photographic carrier according to claim 2 wherein said anti-static agent is an alkali or ammonium salt of a polycarboxylic or polysulphonic acid.
Claim 5
Dependent Claim
14 words
A photographic carrier according to claim 1 wherein said polyolefin is corona discharge activated.
Claim 6
Dependent Claim
75 words
A process for treating a hydrophobic, polyolefin coated photographic carrier paper to render the polyolefin coating receptive to hydrophilic substances which comprises coating said carrier with an aqueous suspension comprising: 0.05 to 6 weight % magnesium or calcium hexafluoro silicate, or mixtures thereof; 1 to 10 weight % matting agent; 3 to 12 weight % colloidal silica; the balance being water; and drying said coating to produce a crystallized coating bonded to the polyolefin coating.
Claim 7
Dependent Claim
75 words
A process for treating a hydrophobic, polyolefin coated photographic carrier paper to render the polyolefin coating receptive to hydrophilic substances which comprises coating said carrier with an aqueous suspension comprising: 0.05 to 6 weight % magnesium or calcium hexafluoro silicate, or mixtures thereof; 1 to 10 weight % matting agent; 3 to 12 weight % colloidal silica; the balance being water; and drying said coating to produce a crystallized coating bonded to the polyolefin coating.
Claim 8
Dependent Claim
23 words
A process according to claim 5 wherein said suspension includes, as a matting agent, calcium magnesium carbonate having a 2-20 Mu particle size.
Claim 9
Dependent Claim
17 words
A process according to claim 5 wherein said colloidal silica has a 2-30 m Mu particle size.
Claim 10
Dependent Claim
11 words
A process according to claim 5 which includes an anti-static agent.
Claim 11
Dependent Claim
18 words
A process according to claim 8 wherein said anti-static agent comprises the sodium salt of polystyrene sulphonic acid.
Claim 12
Dependent Claim
17 words
A process according to claim 8 wherein said anti-static agent is a potassium salt of polyacrylic acid.
Claim 13
Dependent Claim
23 words
A process according to claim 5 wherein said suspension includes, as a matting agent, calcium silicate having a 50-500 m Mu particle size.
Claim 14
Dependent Claim
13 words
A process according to claim 5 wherein said suspension includes butanol or methanol.
Claim 15
Dependent Claim
36 words
A process according to claim 5 wherein said suspension includes, as a matting agent, a mixed precipitation product of calcium silicate and calcium magnesium carbonate with a parTicle size of about 0.1 and 20 Mu .
Claim 16
Dependent Claim
18 words
A process according to claim 13 wherein a portion of the calcium is replaced by aluminum or magnesium.
Claim 17
Dependent Claim
26 words
A process according to claim 14 wherein a portion of the calcium is present in the form of an oxide, hydroxide or other alkaline reacting compound.
Claim 18
Dependent Claim
28 words
A process according to claim 5 wherein the suspension contains 5-40% of a finely dispersed polyacrylic propyl ester having a particle size of 0.05 - 0.50 Mu .
Claim 19
Dependent Claim
14 words
A process according to claim 16 wherein said ester contains 5% polymerized vinyl ether.
Claim 20
Dependent Claim
31 words
A process according to claim 5 wherein the suspension includes a polyacryl acid propyl ester, a polyacryl butyl ester or a styrene butadiene interpolymer having a butadiene content of over 50%.
Claim 21
Dependent Claim
39 words
A process according to claim 5 wherein said matting agent is calcium carbonate or the precipitated double reaction product of a water soluble salt of calcium and a magnesium and/or aluminum salt with sodium or potassium silicate or carbonate.
Claim 22
Dependent Claim
17 words
A process according to claim 5 wherein said suspension includes 0.01 to 0.2% by weight wetting agent.
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) | 1978-10-20 | 1979-04-21 | 1979-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-20 | 1983-04-21 | 1983-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-20 | 1987-04-21 | 1987-10-21 | $7700.00 | Window Closed / Lapsed |