US3157831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated core electromagnet
Assignee: INDTERNAT TELEPHONE AND TELEGR
•
Filing: 1959-03-30
•
Granted: 1964-11-17
•
Expires: 1979-03-30
Abstract
No abstract record available.
Inventors
- 👤 William A Ray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:39
CPC Classifications
H; H01; H01F; H01F7/00; H01F7/06; H01F7/08; H01F7/16; H01F7/1607; H01F7/1623
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
IN AN ELECTROMAGNET STRUCTURE: A CORE; A COIL CARRIED BY THE CORE; A MOVABLE ARMATURE COOPERATING WITH THE CORE; WALL MEANS SUPPORTING THE CORE; AN ACTUATOR CARRIED BY THE ARMATURE AND EXTENDING THROUGH THE WALL MEANS; A SEALING RESILIENT BELLOWS SURROUNDING SAID ACTUATOR AND JOINED THERETO SO AS TO MAINTAIN SAID WALL MEANS IMPER-
Claim 2
Dependent Claim
54 words
IN AN ELECTROMAGNET STRUCTURE: A CORE; A COIL CARRIED BY THE CORE; A MOVABLE ARMATURE COOPERATING WITH THE CORE; WALL MEANS SUPPORTING THE CORE; AN ACTUATOR CARRIED BY THE ARMATURE AND EXTENDING THROUGH THE WALL MEANS; A SEALING RESILIENT BELLOWS SURROUNDING SAID ACTUATOR AND JOINED THERETO SO AS TO MAINTAIN SAID WALL MEANS IMPER-
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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) | 1967-11-17 | 1968-05-18 | 1968-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-17 | 1972-05-18 | 1972-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-17 | 1976-05-18 | 1976-11-17 | $7700.00 | Window Closed / Lapsed |