US4812863A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lens-fitted photographic film package
Assignee: Fujifilm Holdings Corp
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Filing: 1988-02-17
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Granted: 1989-03-14
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Expires: 2008-02-17
Abstract
Abstract A lens-fitted photographic film package having a light-tight film case in which a taking lens, an exposure member and a roll film, with their associated elements, all of which are previously encased therein, is provided with a direct-vision viewfinder comprising a finder frame opening formed in a rearwardly recessed part of a front wall of the light-tight film case and a viewing opening formed in a rear wall of the light-tight film case.
Inventors
- 👤 Hiroshi Ohmura
- 👤 Seiji Asano
- 👤 Toshio Yoshida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:43
CPC Classifications
G; G03; G03B; G03B13/00; G03B13/02; G03B13/04; G03B19/00; G03B19/02; G03B19/04; G03B2219/00; G03B2219/02; G03B2219/04; G03B2219/045
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
82 words
A lens-fitted photographic film package which comprises at least a taking lens, means for effecting an exposure, and a rolled film all of which are incorporated in a light-tight film case as a unit, said light-tight film case having a direct-vision viewfinder with no finder lens which consists of a viewing opening formed in a rear wall of said light-tight film case and a finder frame opening formed in a rearwardly recessed part of a front wall of said light-tight film casing.
Claim 2
Dependent Claim
82 words
A lens-fitted photographic film package which comprises at least a taking lens, means for effecting an exposure, and a rolled film all of which are incorporated in a light-tight film case as a unit, said light-tight film case having a direct-vision viewfinder with no finder lens which consists of a viewing opening formed in a rear wall of said light-tight film case and a finder frame opening formed in a rearwardly recessed part of a front wall of said light-tight film casing.
Claim 3
Dependent Claim
31 words
A lens-fitted photographic film package as defined in claim 1, wherein said rearwardly recessed part is formed in only an upper corner of said front wall of said light-tight film case.
Claim 4
Dependent Claim
34 words
A lens-fitted photographic film package as defined in claim 1, wherein said rearwardly recessed part is formed in one side of said front wall of said light-tight film case from top to bottom thereof.
Claim 5
Dependent Claim
79 words
A lens-fitted photographic film package as defined in claim 1, wherein said viewing opening has a width x defined by the following equation: x=2n tan (18/f) t-y wherein n is the ratio of the field of view of said direct-vision viewfinder to that of said taking lens, f is the focal length of the taking lens, t is the distance between said finder frame opening and said viewing opening, and y is the width of sid finder frame opening.
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) | 1992-03-13 | 1992-09-12 | 1993-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-13 | 1996-09-12 | 1997-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-13 | 2000-09-12 | 2001-03-14 | $7700.00 | Window Closed / Lapsed |