US3704167A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for manufacturing photographic film having a magnetic recording stripe
Assignee: Fujifilm Holdings Corp
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Filing: 1971-06-11
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Granted: 1972-11-28
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Expires: 1991-06-11
Abstract
Abstract AN IMPROVEMENT IS A PROCESS FOR MANUFACTURING A PHOTOGRAPHIC FILM WITH A MAGNETIC RECORDING STRIPE WHEREIN A DISPERSION OF MAGNETIC MATERIAL IS COATED ON AN ANTIHALATION LAYER OF THE LIGHT-SENSITIVE PHOTOGRAPHIC FILM USING AS THE SUPPORT POLYETHYLENE TEREPHTHALATE. THE IMPROVEMENT COMPRISES EITHER ADDING A COMPOUND HAVING AT LEAST TWO AZIRIDINE RINGS INTO THE DISPERSION AND THEN COATING THE DISPERSION ON THE ANTIHALATION LAYER, OR BY FIRST TREATING THE ANTIHALATION LAYER WITH A SOLUTION CONTAINING A COMPOUND HAVING AT LEAST TWO AZIRIDINE RINGS AND THEN COATING THE DISPERSION ON THE ANTIHALATION LAYER THUS OBTAINED.
Inventors
- 👤 Nobuo Yamamoto
- 👤 Hideo Kawaguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:44
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/91; G11; G11B; G11B5/00; G11B5/74; Y; Y10; Y10S; Y10S428/00; Y10S428/90; Y10S430/00; Y10S430/136
Claims Analysis
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References Cited (Backward Citations)
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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) | 1975-11-28 | 1976-05-29 | 1976-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-28 | 1980-05-29 | 1980-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-28 | 1984-05-29 | 1984-11-28 | $7700.00 | Window Closed / Lapsed |