Patent US3197615A successfully refreshed from Google Patents.
US3197615A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric heating apparatus
Assignee: Edwin L Wiegand Co
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Filing: 1961-03-20
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Granted: 1965-07-27
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Expires: 1981-03-20
Abstract
No abstract record available.
Inventors
- 👤 Wetiesen Johan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:12
CPC Classifications
H; H02; H02G; H02G3/00; H02G3/02; H02G3/06; H02G3/0616; H02G3/0625; H02G3/0658; F; F24; F24C; F24C7/00; F24C7/06
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
138 words
AN ELECTRIC HEATER ASSEMBLY FOR ATTACHMENT TO AN APERTURED OVEN WALL, COMPRISING A LARGE AND A SMALL METAL PLATE IN FACE TO FACE RELATIN, THE LARGER PLATE BEING OF FLEXIBLE MATERIAL AND SAID PLATES HAVING CERTAIN MARGINAL PORTIONS ADJOINING AND MECHANICALLY AND ELECTRICALLY CONNECTED AND OPPOSITE FREE PORTIONS OVERLYING AND CAPABLE OF MOVING APART THROUGH FLEXURE OF SAID LARGE PLATE, A SHEATHED ELECTRIC HEATING ELEMENT HAVING A TERMINAL PORTION WHICH IS MECHANICALLY AND ELECTRICALLY CONNECTED TO SAID SMALL PLATE AND WHICH PASSES THROUGH AN OVERSIZE OPENING IN SAID LARGE PLATE TO ACCOMMODATE FREE FLEXURE OF THE LATTER, THE FREE END OF SAID LARGE PLATE BEING ADAPTED TO BE MECHANICALLY AND ELECTRICALLY CONNECTED TO SAID OVEN WALL AT SAID OVEN APERTURE WHEREBY SAID LARGE PLAT NORMALLY OVERLIES THE INNER SURFACE OF SAID OVEN WALL AND CLOSES SAID OVEN APERTURE.
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) | 1968-07-26 | 1969-01-25 | 1969-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-26 | 1973-01-25 | 1973-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-26 | 1977-01-25 | 1977-07-27 | $7700.00 | Window Closed / Lapsed |