Patent US4021891A successfully refreshed from Google Patents.
US4021891A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic lock closure
Assignee: Application Art Laboratories Co Ltd
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Filing: 1974-04-18
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Granted: 1977-05-10
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Expires: 1994-04-18
Abstract
Abstract A magnetic lock closure used for a handbag or the like for closure comprising two separate parts at least one of which is formed as a female device in a permanent magnet of a cylindrical or any other shape having a hole or slit centrally thereof and its opposite ends magnetized in a different polarity, the female device including a piece of ferromagnetic material firmly provided at one end thereof and having a rod portion for insertion into the hole or slit such that the force of its magnetism is centered about the piece of ferromagnetic material which attracts the other part or male device formed of ferromagnetic material.
Inventors
- 👤 Tamao Morita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:35
CPC Classifications
A; A45; A45C; A45C13/00; A45C13/10; A45C13/1069; E; E05; E05C; E05C19/00; E05C19/16; Y; Y10; Y10T; Y10T24/00; Y10T24/32; Y10T292/00; Y10T292/11
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
158 words
A magnetic lock closure for use with handbags and similar containers comprising: magnetic means for supplying magnetic attraction having a first side and a second side of opposite polarities and a hole therethrough between said two sides; first ferromagnetic material means rigidly secured to said first side of said magnetic means over said hole for centering the force of the magnetic attraction of said magnetic means; and second ferromagnetic material means removably positioned against said second side of said magnetic means for contacting and being attracted to said first ferromagnetic means through said hole, said second ferromagnetic material means comprised of: a plate adjacent said second side of said magnetic means over said hole, and a rod the shape of said hole rigidly attached to said plate extending through said hole and contacting said first ferro-magnetic material means, whereby said second ferromagnetic material means is magnetically attracted and connected to said first ferromagnetic material means through said hole.
Claim 2
Dependent Claim
158 words
A magnetic lock closure for use with handbags and similar containers comprising: magnetic means for supplying magnetic attraction having a first side and a second side of opposite polarities and a hole therethrough between said two sides; first ferromagnetic material means rigidly secured to said first side of said magnetic means over said hole for centering the force of the magnetic attraction of said magnetic means; and second ferromagnetic material means removably positioned against said second side of said magnetic means for contacting and being attracted to said first ferromagnetic means through said hole, said second ferromagnetic material means comprised of: a plate adjacent said second side of said magnetic means over said hole, and a rod the shape of said hole rigidly attached to said plate extending through said hole and contacting said first ferro-magnetic material means, whereby said second ferromagnetic material means is magnetically attracted and connected to said first ferromagnetic material means through said hole.
Claim 3
Dependent Claim
46 words
A magnetic lock closure as claimed in claim 1, wherein: said first ferromagnetic means is comprised of a first plate attached to said first side of said magnetic means and a rod the shape of said hole attached to said first plate extending into said hole.
Claim 4
Dependent Claim
61 words
A magnetic lock closure as claimed in claim 1, wherein: said first plate extends beyond said first side and has holes therein, whereby said first plate and the magnetic means attached thereto can be attached to a surface; and said second plate extends beyond said second side and has holes therein whereby said second plate can be attached to a surface.
Claim 5
Dependent Claim
20 words
A magnetic lock closure as claimed in claim 1, wherein said first and second ferromagnetic means are comprised of iron.
Claim 6
Dependent Claim
19 words
A magnetic lock closure as claimed in claim 1, wherein said magnetic means is comprised of a permanent magnet.
Claim 7
Dependent Claim
18 words
A magnetic lock closure as claimed in claim 5, wherein said magnetic means is covered with non-ferromagnetic material.
Claim 8
Dependent Claim
21 words
A magnetic lock closure as claimed in claim 5, wherein said magnetic means is a cylindrical shape with a hole therethrough.
Claim 9
Dependent Claim
21 words
A magnetic lock closure as claimed in claim 5, wherein said magnetic means is a rectangular shape with a hole therethrough.
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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) | 1980-05-09 | 1980-11-08 | 1981-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-09 | 1984-11-08 | 1985-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-09 | 1988-11-08 | 1989-05-10 | $7700.00 | Window Closed / Lapsed |