US3232654A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic door holder and releasing device
Assignee: Eriez Manufacturing Co
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Filing: 1963-03-06
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Granted: 1966-02-01
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Expires: 1983-03-06
Abstract
No abstract record available.
Inventors
- 👤 Arlo F Israelson
- 👤 William F Sosey
- 👤 Nelson T Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:33
CPC Classifications
E; E05; E05C; E05C17/00; E05C17/56; Y; Y10; Y10T; Y10T292/00; Y10T292/11; Y10T292/68; Y10T292/696; Y10T292/699
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
53 words
IN COMBINATION, A SAFETY DEVICE AND A DOOR, SAID DOOR HAVING MEANS COMPRISING AN ARMATURE MADE OF MAGNETIC MATERIAL ATTACHED TO SAID DOOR, A SOLENOID, A PLUNGER SLIDABLY SUPPORTED IN SAID SOLENOID, A PERMANENT MAGNET FIXED RELATIVE TO SAID PLUNGER, AND SPACERS ON SAID SAFETY DEVICE, SAID MAGNET BEING MOVABLE BETWEEN SAID SPACERS,
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) | 1969-01-31 | 1969-08-02 | 1970-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-31 | 1973-08-02 | 1974-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-31 | 1977-08-02 | 1978-02-01 | $7700.00 | Window Closed / Lapsed |