Patent US3744833A successfully refreshed from Google Patents.
US3744833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic latch
Assignee: Individual
•
Filing: 1971-04-14
•
Granted: 1973-07-10
•
Expires: 1991-04-14
Abstract
Abstract A magnetic latch comprises a pair of magnets in mutually repelling position so that one of them is urged into a latching position, and a third magnet which when brought close to the latching magnet overcomes the repulsion and withdraws the latching magnet, and when remote from the latching magnet permits the latching magnet to resume latching position.
Inventors
- 👤 D Berducone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:13
CPC Classifications
E; E05; E05B; E05B47/00; E05B47/0038; Y; Y10; Y10T; Y10T292/00; Y10T292/11; Y10T70/00; Y10T70/70; Y10T70/7051; Y10T70/7057
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A container having a magnetic latch comprising a pair of permanent magnets arranged to repel each other, one of said magnets being mounted for movement on and relative to the container between extended and retracted positions, and a third permanent magnet movable toward and away from said one magnet selectively to overcome the repulsion of said pair of magnets thereby to draw said one magnet to said retracted position, the other of said pair of magnets being fixedly mounted on the inside of said container, said one magnet being mounted for movement parallel to the poles of said fixed magnet, said third magnet being movable in a direction transverse to the path of movement of said one magnet.
Claim 2
Dependent Claim
118 words
A container having a magnetic latch comprising a pair of permanent magnets arranged to repel each other, one of said magnets being mounted for movement on and relative to the container between extended and retracted positions, and a third permanent magnet movable toward and away from said one magnet selectively to overcome the repulsion of said pair of magnets thereby to draw said one magnet to said retracted position, the other of said pair of magnets being fixedly mounted on the inside of said container, said one magnet being mounted for movement parallel to the poles of said fixed magnet, said third magnet being movable in a direction transverse to the path of movement of said one magnet.
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) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |