US3612709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Looseleaf binder
Assignee: King Jim Co Ltd
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Filing: 1969-06-03
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Granted: 1971-10-12
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Expires: 1989-06-03
Abstract
Abstract A looseleaf binder formed integrally of synthetic resin having proper toughness and elasticity which comprises a cover plate provided in its internal surface with at least two or more posts, a base plate provided on its inner surface facing the inner surface of the cover plate with at least two or more sockets into which said posts are fitted disengageably and a flexible connecting means for joining the cover plate with the base plate symmetrically.
Inventors
- 👤 Eitaro Miyamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:04
CPC Classifications
B; B42; B42F; B42F13/00; B42F13/16; B42F13/20; B42F13/28
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
162 words
A looseleaf binder of synthetic plastic material and comprising a base plate, a cover plate, a flexible member hingedly connecting the base plate to the cover plate, at least two connecting assemblies each comprising an interengaging post and socket, the post being mounted on one of the said plates and the socket on the other of said plates, the length of the socket being sufficient to receive a major part of the length of the post, the base plate and the cover plate having outer and inner edges, the flexible member extending between the inner edges, the posts and sockets being situated near the outer edges, the binder having an elongated ridge located along the inner edge of one of the plates and extending generally perpendicular to said plate, and an elongated curved edge extending along the inner edge of the other plate such that, when the posts and sockets are interengaged, the top of the ridge nests in said curved edge.
Claim 2
Dependent Claim
162 words
A looseleaf binder of synthetic plastic material and comprising a base plate, a cover plate, a flexible member hingedly connecting the base plate to the cover plate, at least two connecting assemblies each comprising an interengaging post and socket, the post being mounted on one of the said plates and the socket on the other of said plates, the length of the socket being sufficient to receive a major part of the length of the post, the base plate and the cover plate having outer and inner edges, the flexible member extending between the inner edges, the posts and sockets being situated near the outer edges, the binder having an elongated ridge located along the inner edge of one of the plates and extending generally perpendicular to said plate, and an elongated curved edge extending along the inner edge of the other plate such that, when the posts and sockets are interengaged, the top of the ridge nests in said curved edge.
Claim 3
Dependent Claim
37 words
A binder according to claim 1, wherein at least two flexible members extend between the base plate and the cover plate, and the ridge and the curved edge extend along said inner edges between the flexible members.
Claim 4
Dependent Claim
27 words
A binder according to claim 1, wherein the top of the ridge is convex and the curved edge has a concave portion to receive said convex top.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-11 | 1975-04-12 | 1975-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-11 | 1979-04-12 | 1979-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-11 | 1983-04-12 | 1983-10-12 | $7700.00 | Window Closed / Lapsed |