Patent US4433030A successfully refreshed from Google Patents.
US4433030A
Expired / Lapsed
US
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Photographic support
Assignee: Fujifilm Holdings Corp
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Filing: 1982-04-28
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Granted: 1984-02-21
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Expires: 2002-04-28
Abstract
Abstract A water-proof photographic support comprising a paper sheet coated with a polyolefin on both surfaces thereof, in which the paper sheet contains both of an alkylketene dimer and a cationic polyacrylamide.
Inventors
- 👤 Shigehisa Tamagawa
- 👤 Tetsuro Fuchizawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:30
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/775; G03C1/79; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31725; Y10T428/3175; Y10T428/31757; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31899; Y10T428/31902; Y10T428/31906; Y10T428/31909; Y10T428/31913; Y10T428/31935
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
60 words
A water-proof photographic support comprising a paper sheet coated with a polyolefin on both surfaces thereof, in which the paper sheet contains an alkylketene dimer in an amount of 0.2-3.0% by weight based on the weight of absolutely dried pulp constituting the paper sheet, and a cationic polyacrylamide in an amount of 1/10-10/1 of the weight of the alkylketene dimer.
Claim 2
Dependent Claim
60 words
A water-proof photographic support comprising a paper sheet coated with a polyolefin on both surfaces thereof, in which the paper sheet contains an alkylketene dimer in an amount of 0.2-3.0% by weight based on the weight of absolutely dried pulp constituting the paper sheet, and a cationic polyacrylamide in an amount of 1/10-10/1 of the weight of the alkylketene dimer.
Claim 3
Dependent Claim
35 words
The water-proof photographic support as claimed in claim 1, in which the cationic polyacrylamide is contained in the paper sheet in a proportion ranging from 1/4 to 4/1 of the weight of the alkylketene dimer.
Claim 4
Dependent Claim
22 words
The water-proof photographic support as claimed in claim 1, in which the alkylketene dimer has an alkyl group containing 8-30 carbon atoms.
Claim 5
Dependent Claim
22 words
The water-proof photographic support as claimed in claim 1, in which the alkylketene dimer has an alkyl group containing 12-18 carbon atoms.
Claim 6
Dependent Claim
23 words
The water-proof photographic support as claimed in claim 1, in which the cationic polyacrylamide has the molecular weight ranging from 100,000 to 2,000,000.
Claim 7
Dependent Claim
23 words
The water-proof photographic support as claimed in claim 1, in which the cationic polyacrylamide has the molecular weight ranging from 500,000 to 1,000,000.
Claim 8
Dependent Claim
49 words
The water-proof photographic support as claimed in claim 1, in which the cationic polyacrylamide is selected from the group consisting of a Mannich modification product of polyacrylamide, a Hofmann degradation product of polyacrylamide, a reaction product between polyacrylamide and polyethyleneimine, and a copolymer of acrylamide with a cationic monomer.
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) | 1987-02-20 | 1987-08-22 | 1988-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-20 | 1991-08-22 | 1992-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-20 | 1995-08-22 | 1996-02-21 | $7700.00 | Window Closed / Lapsed |