US3742634A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Index card, file or similar flat element for a filing system
Assignee: Optische Industrie de Oude Delft NV
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Filing: 1971-07-12
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Granted: 1973-07-03
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Expires: 1991-07-12
Abstract
Abstract Index card, file or similar flat element for a filing system, which element along one edge is provided with a code which can be read in a direction parallel to the main plane of the element. For this purpose the element is provided along one edge with a reflector of transparant material comprising at the position of the code a surface which makes an acute angle with the main plane of the element, in which surface the code is reflected.
Inventors
- 👤 Haaften J Van
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:29
CPC Classifications
B; B42; B42F; B42F17/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
174 words
A filing system comprising a plurality of generally rectangular planar outer envelope members, means for supporting said envelope members in parallel, side-by-side relation with an edge portion of each of said envelopes exposed for visual access from a direction parallel to the plane of said envelopes, said envelopes having an information bearing substrate disposed therein, coded indicia formed adjacent one edge of said substrates, transparent window portions formed in said envelopes adjacent said exposed edge portions, said window portions being coextensive with and in registry with said coded indicia of said substrates so that said indicia are exposed through said window portions, each said envelope including a prism member on the outer surface thereof, said prism members being disposed in covering relation of said window portions and in registry with said indicia on sAid substrate, said prism members including a reflector wall angularly oriented with respect to said envelope and directed toward said edge of said envelope, whereby said indicia on said substrate are visible through said prism members when viewed from said direction.
Claim 2
Dependent Claim
174 words
A filing system comprising a plurality of generally rectangular planar outer envelope members, means for supporting said envelope members in parallel, side-by-side relation with an edge portion of each of said envelopes exposed for visual access from a direction parallel to the plane of said envelopes, said envelopes having an information bearing substrate disposed therein, coded indicia formed adjacent one edge of said substrates, transparent window portions formed in said envelopes adjacent said exposed edge portions, said window portions being coextensive with and in registry with said coded indicia of said substrates so that said indicia are exposed through said window portions, each said envelope including a prism member on the outer surface thereof, said prism members being disposed in covering relation of said window portions and in registry with said indicia on sAid substrate, said prism members including a reflector wall angularly oriented with respect to said envelope and directed toward said edge of said envelope, whereby said indicia on said substrate are visible through said prism members when viewed from said direction.
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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) | 1976-07-02 | 1977-01-01 | 1977-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-02 | 1981-01-01 | 1981-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-02 | 1985-01-01 | 1985-07-03 | $7700.00 | Window Closed / Lapsed |