US3849166A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for providing subbing layer of photographic film
Assignee: Fujifilm Holdings Corp
•
Filing: 1972-02-16
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Granted: 1974-11-19
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Expires: 1992-02-16
Abstract
Abstract A method for providing a subbing layer on a photographic film where a biaxially stretched and heat-set polyethylene terephthalate film is to be provided with a hydrophilic surface comprising applying an aqueous solution containing hydrogen peroxide to the treated surface, applying ultra violet radiation while the coated surface is wet and then applying a hydrophilic resin solution or gelatin dispersion containing a solvent or swelling agent for the polyethylene terephthalate to thereby form the subbing layer.
Inventors
- 👤 S Adachihara
- 👤 T Omichi
- 👤 T Ikeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:34
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/91; G03C1/915; Y; Y10; Y10S; Y10S430/00; Y10S430/136
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
116 words
A METHOD OF PROVIDING A SUBBING LAYER FOR A PHOTOGRAPHIC FILM COMPRISING THE STEPS OF: (A) PROVIDING A BIAXIALLY STRETCHED AND HEAT-SET POLYETHYLENE TEREPHTHALATE FILM SUPPORT; (B) TREATING THE SURFACE OF SAID SUPPORT TO IMPART THERETO A HYDROPHILIC PROPERTY; (C) APPLYING TO SAID TREATED SURFACE AN AQUEOUS SOLUTION OF HYDROGEN PEROXIDE OR AN AQUEOUS SOLUTION OF HYDROGEN PEROXIDE FURTHER CONTAINING A WATER MISCIBLE SOLVENT; (D) APPLYING ULTRAVIOLET RAYS TO SAID TREATED SURFACE WHILE SAID SURFACE IS IN WET STATE FROM STEP (C9; AND (E) APPLYING A HYDROPHILIC RESIN SOLUTION OR GELATIN DISPERSION IN A MIXED ORGANIC SOLVENT CONTAINING A SOLVENT OR SWELLING AGENT FOR POLYETHYLENE TEREPHTHALATE TO THE TREATED SURFACE TO FORM THEREFROM SAID SUBBING LAYER.
Claim 2
Independent Claim
116 words
A METHOD OF PROVIDING A SUBBING LAYER FOR A PHOTOGRAPHIC FILM COMPRISING THE STEPS OF: (A) PROVIDING A BIAXIALLY STRETCHED AND HEAT-SET POLYETHYLENE TEREPHTHALATE FILM SUPPORT; (B) TREATING THE SURFACE OF SAID SUPPORT TO IMPART THERETO A HYDROPHILIC PROPERTY; (C) APPLYING TO SAID TREATED SURFACE AN AQUEOUS SOLUTION OF HYDROGEN PEROXIDE OR AN AQUEOUS SOLUTION OF HYDROGEN PEROXIDE FURTHER CONTAINING A WATER MISCIBLE SOLVENT; (D) APPLYING ULTRAVIOLET RAYS TO SAID TREATED SURFACE WHILE SAID SURFACE IS IN WET STATE FROM STEP (C9; AND (E) APPLYING A HYDROPHILIC RESIN SOLUTION OR GELATIN DISPERSION IN A MIXED ORGANIC SOLVENT CONTAINING A SOLVENT OR SWELLING AGENT FOR POLYETHYLENE TEREPHTHALATE TO THE TREATED SURFACE TO FORM THEREFROM SAID SUBBING LAYER.
Claim 3
Dependent Claim
21 words
The method as claimed in claim 1, wherein the surface treatment of the support in step (b) is by corona discharging.
Claim 4
Dependent Claim
21 words
The method as claimed in claim 1, wherein the surface treatment of the support in step (b) is by flame treatment.
Claim 5
Dependent Claim
25 words
The method as claimed in claim 1, wherein said aqueous hydrogen peroxide solution is a 0.001 to 30 wt. percent of aqueous hydrogen peroxide solution.
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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) | 1977-11-18 | 1978-05-20 | 1978-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-18 | 1982-05-20 | 1982-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-18 | 1986-05-20 | 1986-11-19 | $7700.00 | Window Closed / Lapsed |