US3214274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of photographic materials
Assignee: Mitsubishi Paper Mills Ltd
•
Filing: 1961-10-17
•
Granted: 1965-10-26
•
Expires: 1981-10-17
Abstract
No abstract record available.
Inventors
- 👤 Ohyama Yasushi
- 👤 Maruyama Syuichi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:44
CPC Classifications
B; B41; B41N; B41N1/00; B41N1/12; B41N1/14; G; G03; G03C; G03C1/00; G03C1/76; G03C1/91; G03C1/93; G03C8/00; G03C8/24; G03C8/26; G03C8/28; Y; Y10; Y10S; Y10S430/00; Y10S430/151; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31786; Y10T428/31797
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
102 words
THE METHOD OF APPLYING A SUBBING LAYER TO A PHOTOGRAPHIC FILM BASE WHICH COMPRISES APPLYING TO SAID BASE A COATING SOLUTION OF A HYDROPHOBIC COPOLYMER CONTAINING 50-90% VINYLIDENE CHLORIDE DISSOLVED IN A MIXED SOLVENT CONSISTING ESSENTIALLY OF (1) AN AROMATIC HYDROCARBON AND (2) A HIGHLY VOLATILE KETONE, THE PROPORTION OF SAID KETONE BEING 30 TO 50% BY WEIGHT, PASSING A CURRENT OF MOIST AIR OVER SAID COATING, TO EVAPORATE SAID SOLVENT, SAID GAS FLOWING AT A VELOCITY OF FROM 0.5 TO 4M./SEC., AT A TEMPERATURE OF FROM 50 TO 85*F., AND A RELATIVE HUMIDITY OF AT LEAST 70%, WHEREBY SAID SOLVENT EVAPORATES
Claim 2
Independent Claim
102 words
THE METHOD OF APPLYING A SUBBING LAYER TO A PHOTOGRAPHIC FILM BASE WHICH COMPRISES APPLYING TO SAID BASE A COATING SOLUTION OF A HYDROPHOBIC COPOLYMER CONTAINING 50-90% VINYLIDENE CHLORIDE DISSOLVED IN A MIXED SOLVENT CONSISTING ESSENTIALLY OF (1) AN AROMATIC HYDROCARBON AND (2) A HIGHLY VOLATILE KETONE, THE PROPORTION OF SAID KETONE BEING 30 TO 50% BY WEIGHT, PASSING A CURRENT OF MOIST AIR OVER SAID COATING, TO EVAPORATE SAID SOLVENT, SAID GAS FLOWING AT A VELOCITY OF FROM 0.5 TO 4M./SEC., AT A TEMPERATURE OF FROM 50 TO 85*F., AND A RELATIVE HUMIDITY OF AT LEAST 70%, WHEREBY SAID SOLVENT EVAPORATES
Claim 3
Dependent Claim
53 words
A DIMENSIONALLY STABLE PHOTOGRAPHIC ELEMENT COMPRISING A PHOTOGRAPHIC FILM BASE, A SUBBING LAYER OF A HYDROPHOBIC VINYLIDENE CHLORIDE COPOLYMER COATED THEREON, SAID LAYER HAVING THE OUTER SURFACE THEREOF COVERED WITH MICROPORES OF A SIZE FROM 0.1 TO 1 MICRON, AND A HYDROPHILLIC PHOTOGRAPHIC EMULSION LAYER UPON SAID SUBBING LAYER AND FILLING SAID MICROPORES.
Claim 4
Dependent Claim
53 words
A DIMENSIONALLY STABLE PHOTOGRAPHIC ELEMENT COMPRISING A PHOTOGRAPHIC FILM BASE, A SUBBING LAYER OF A HYDROPHOBIC VINYLIDENE CHLORIDE COPOLYMER COATED THEREON, SAID LAYER HAVING THE OUTER SURFACE THEREOF COVERED WITH MICROPORES OF A SIZE FROM 0.1 TO 1 MICRON, AND A HYDROPHILLIC PHOTOGRAPHIC EMULSION LAYER UPON SAID SUBBING LAYER AND FILLING SAID MICROPORES.
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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) | 1968-10-25 | 1969-04-26 | 1969-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-25 | 1973-04-26 | 1973-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-25 | 1977-04-26 | 1977-10-26 | $7700.00 | Window Closed / Lapsed |