US3081387A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit breaker
Assignee: Heinemann Electric Co
•
Filing: 1960-12-20
•
Granted: 1963-03-12
•
Expires: 1980-12-20
Abstract
No abstract record available.
Inventors
- 👤 Benjamin H Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:04
CPC Classifications
H; H01; H01H; H01H71/00; H01H71/10; H01H71/12; H01H71/24; H01H71/34; H01H71/345
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
AN ELECTROMAGNETIC STRUCTURE COMPRISING AN ARMATURE, AN ELECTROMAGNET IN OPERATIVE ASSOCIATION WITH SAID ARMATURE, SAID ELECTROMAGNET INCLUDING A COIL AND A MAGNETIZABLE FRAME IN THE MAGNETIC FIELD OF SAID COIL, A TWOPIECE MAGNETIZABLE CORE, ONE OF SAID TWO PIECES OF SAID CORE BEING MOVED BY THE COIL FOR MOVING THE SECOND CORE PIECE, AND MAGNETIC MEANS RELEASABLE AFTER SUFFICIENT MOVEMENT OF THE SECOND CORE PIECE FOR RESTRAINING SAID ARMATURE PRIOR TO SAID MOVEMENT.
Claim 2
Dependent Claim
73 words
AN ELECTROMAGNETIC STRUCTURE COMPRISING AN ARMATURE, AN ELECTROMAGNET IN OPERATIVE ASSOCIATION WITH SAID ARMATURE, SAID ELECTROMAGNET INCLUDING A COIL AND A MAGNETIZABLE FRAME IN THE MAGNETIC FIELD OF SAID COIL, A TWOPIECE MAGNETIZABLE CORE, ONE OF SAID TWO PIECES OF SAID CORE BEING MOVED BY THE COIL FOR MOVING THE SECOND CORE PIECE, AND MAGNETIC MEANS RELEASABLE AFTER SUFFICIENT MOVEMENT OF THE SECOND CORE PIECE FOR RESTRAINING SAID ARMATURE PRIOR TO SAID MOVEMENT.
References Cited (Backward Citations)
US2072932A
Cited
US2451962A
Cited
US2690528A
Cited
US2700711A
Cited
US2709731A
Cited
US2878338A
Cited
US2756302A
Cited
US2898420A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-03-11 | 1966-09-10 | 1967-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-11 | 1970-09-10 | 1971-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-11 | 1974-09-10 | 1975-03-12 | $7700.00 | Window Closed / Lapsed |