US4145480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic paper support
Assignee: Mitsubishi Paper Mills Ltd
•
Filing: 1977-06-21
•
Granted: 1979-03-20
•
Expires: 1997-06-21
Abstract
Abstract A polyolefin layer carried on at least one surface of a polyolefin resin coated paper for use as a photographic paper support, contains a titanium oxide composition comprising 20-60 parts by weight of a rutile-type titanium oxide and 40-80 parts by weight of an anatase-type titanium oxide per 100 parts by weight of the titanium oxide composition. Such polyolefin resin coated paper is excellent in hiding power, resolving power, light resistance, whiteness, fading resistance, etc.
Inventors
- 👤 You Kusama
- 👤 Yoshinori Harikae
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:23
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/775; G03C1/79; G03C1/815; G03C2200/00; G03C2200/42; Y; Y10; Y10S; Y10S428/00; Y10S428/917; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31899; Y10T428/31902
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
61 words
A photographic paper support comprising a base paper both surfaces of which are coated with polyolefin resins, characterized in that at least one polyolefin resin layer contains titanium oxide composition which comprises 20-60 parts by weight of a rutile-type titanium oxide and 40-80 parts by weight of an anatase-type titanium oxide per 100 parts by weight of the titanium oxide composition.
Claim 2
Dependent Claim
61 words
A photographic paper support comprising a base paper both surfaces of which are coated with polyolefin resins, characterized in that at least one polyolefin resin layer contains titanium oxide composition which comprises 20-60 parts by weight of a rutile-type titanium oxide and 40-80 parts by weight of an anatase-type titanium oxide per 100 parts by weight of the titanium oxide composition.
Claim 3
Dependent Claim
32 words
A photographic paper support according to claim 1, wherein the titanium oxide composition is contained in an amount of 2-20 parts by weight per 100 parts by weight of the polyolefin resin.
Claim 4
Dependent Claim
13 words
A photographic paper support according to claim 1, wherein the polyolefin is polyethylene.
Claim 5
Dependent Claim
20 words
A photographic paper support according to claim 1, wherein the rutile-type and anatase-type titanium oxides are treated with hydrous alumina.
Claim 6
Dependent Claim
33 words
A photographic paper support according to claim 1, wherein the titanium oxide composition comprises 25-40 parts by weight of the rutile-type titanium oxide and 60-75 parts by weight of the anatase-type titanium oxide.
Claim 7
Dependent Claim
19 words
A photographic paper support according to claim 1, wherein a fluorescent brightening agent is contained in the polyolefin resin.
Claim 8
Dependent Claim
24 words
A photographic paper support according to claim 6, wherein the amount of the fluorescent brightening agent is about 0.01-6% by weight of the polyolefin.
Claim 9
Dependent Claim
18 words
A photographic paper support according to claim 1, wherein a colored pigment is contained in the polyolefin resin.
Claim 10
Dependent Claim
23 words
A photographic paper support according to claim 8, wherein the amount of the colored pigment is about 0.001-1% by weight of the polyolefin.
References Cited (Backward Citations)
US3009416A
Cited
US3561992A
Cited
US3501298A
Cited
US3676175A
Cited
US3911191A
Cited
US3776761A
Cited
US3914522A
Cited
US4042398A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-03-19 | 1982-09-18 | 1983-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-19 | 1986-09-18 | 1987-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-19 | 1990-09-18 | 1991-03-20 | $7700.00 | Window Closed / Lapsed |