Patent US5183432A successfully refreshed from Google Patents.
US3191003A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface heating unit
Assignee: General Electric Co
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Filing: 1961-12-21
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Granted: 1965-06-22
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Expires: 1981-12-21
Abstract
No abstract record available.
Inventors
- 👤 Charles H Yohe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:01
CPC Classifications
F; F24; F24C; F24C15/00; F24C15/10; F24C15/102; F24C15/105; H; H05; H05B; H05B3/00; H05B3/68; H05B3/681
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
84 words
A HEATING UNIT COMPRISING: A FLAT ANNULAR STRUCTURE HAVING A PLANE SURFACE ON WHICH TO PLACE AN OBJECT TO BE HEATED, THE WALL OF SAID STRUCTURE DEFINING THE ANNULAR OPENING HAVING A CONTINUOUS SHOULDER, MEANS FOR HEATING SAID ANNULUS TO DESIRED TEMPERATURE, A DISC OF GOOD HEAT TRANSFER MATERIAL OCCUPYING SAID ANNULAR OPENING, THE PERIPHERY OF SAID DISC ENGAGING WITH SAID SHOULDER FOR HEAT TRANSFER RELATIVE THERETO AND SAID DISC BEING COPLANAR WITH SAID ANNULAR STRUCTURE SO AS TO PROVIDE THEREWITH A SUBSTANTIALLY CON-
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) | 1968-06-21 | 1968-12-21 | 1969-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-21 | 1972-12-21 | 1973-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-21 | 1976-12-21 | 1977-06-22 | $7700.00 | Window Closed / Lapsed |