Patent US3300614A successfully refreshed from Google Patents.
US3300614A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power transformer for industrial heating apparatus
Assignee: Ohio Crankshaft Co
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Filing: 1964-04-17
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Granted: 1967-01-24
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Expires: 1984-04-17
Abstract
No abstract record available.
Inventors
- 👤 Phillips N Sorensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:02
CPC Classifications
H; H01; H01F; H01F38/00; H01F38/16
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
75 words
IN A POWER TRANSFORMER COMPRISING A PRIMARY WINDING, A SECONDARY WINDING AND A STATIONARY CORE HAVING A LEG AND INDUCTIVELY COUPLED TO BOTH OF SAID WINDINGS, THE IMPROVEMENT COMPRISING: SAID SECONDARY WINDING HAVING AN ELONGATED CENTRAL OPENING, A WEAR RESISTANT GUIDE MEANS MOUNTED ON SAID LEG AND SURROUNDED BY SAID SECONDARY WINDING, SAID GUIDE MEANS CONTACTING SAID OPENING AND CONTOURED TO ALLOW RECIPROCAL AND OSCILLATING MOVEMENT OF SAID SECONDARY WINDING WITH RESPECT TO SAID LEG.
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) | 1970-01-23 | 1970-07-25 | 1971-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-23 | 1974-07-25 | 1975-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-23 | 1978-07-25 | 1979-01-24 | $7700.00 | Window Closed / Lapsed |