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US3237090A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Welding transformer
Assignee: Emerson Electric Co
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Filing: 1961-10-11
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Granted: 1966-02-22
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Expires: 1981-10-11
Abstract
No abstract record available.
Inventors
- 👤 Neal B Royer
- 👤 Walter P Jost
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:06
CPC Classifications
H; H01; H01F; H01F38/00; H01F38/08; H01F38/085
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
IN A WELDING TRANSFORMER WHEREIN PRIMARY AND SECONDARY COILS ARE MOUNTED AT LEAST PARTLY INBOARD OF A FRAME DEFINING A CLOSED MAGNETIC CIRCUIT THE IMPROVEMENT COMPRISING A CHOKE COIL MOUNTED ON AND OUTBOARD OF SAID FRAME TO EMBRACE SAID CLOSED CIRCUIT AND A PLURALITY OF WELDING CONNECTED TO AND ALONG SAID CHOKE COIL.
Claim 2
Dependent Claim
53 words
IN A WELDING TRANSFORMER WHEREIN PRIMARY AND SECONDARY COILS ARE MOUNTED AT LEAST PARTLY INBOARD OF A FRAME DEFINING A CLOSED MAGNETIC CIRCUIT THE IMPROVEMENT COMPRISING A CHOKE COIL MOUNTED ON AND OUTBOARD OF SAID FRAME TO EMBRACE SAID CLOSED CIRCUIT AND A PLURALITY OF WELDING CONNECTED TO AND ALONG SAID CHOKE COIL.
References Cited (Backward Citations)
US1530649A
Cited
US2085242A
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US2186207A
Cited
US2406045A
Cited
US2440984A
Cited
US2686291A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-21 | 1969-08-23 | 1970-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-21 | 1973-08-23 | 1974-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-21 | 1977-08-23 | 1978-02-22 | $7700.00 | Window Closed / Lapsed |