US3198178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Open hearth furnace door
Assignee: Individual
•
Filing: 1962-07-17
•
Granted: 1965-08-03
•
Expires: 1982-07-17
Abstract
No abstract record available.
Inventors
- 👤 June H Reighart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:56
CPC Classifications
F; F27; F27D; F27D1/00; F27D1/18; F27D1/1858
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A WATER-COOLED HEARTH FURNACE DOOR COMPRISING A HOLLOW METAL SHELL FORMING A WATER JACKET SPACE OVER THE OUTER SIDE OF THE DOOR, A CLOSURE PLATE CONNECTED TO THE EXTERIOR OF THE LOWER OUTER EDGE PLATE CONNECTED SHELL AND FORMING THEREWITH A COMPARTMENT ON THE EXTERIOR OF SAID SHELL, AND REFRACTORY MATERAIL FILLING SAID COMPARTMENT AND PROVIDING PROTECTION FOR SAID LOWER OUTER EDGE PORTION OF SAID SHELL AGAINST THE SPLASHING OF HOT METAL.
Claim 2
Dependent Claim
72 words
A WATER-COOLED HEARTH FURNACE DOOR COMPRISING A HOLLOW METAL SHELL FORMING A WATER JACKET SPACE OVER THE OUTER SIDE OF THE DOOR, A CLOSURE PLATE CONNECTED TO THE EXTERIOR OF THE LOWER OUTER EDGE PLATE CONNECTED SHELL AND FORMING THEREWITH A COMPARTMENT ON THE EXTERIOR OF SAID SHELL, AND REFRACTORY MATERAIL FILLING SAID COMPARTMENT AND PROVIDING PROTECTION FOR SAID LOWER OUTER EDGE PORTION OF SAID SHELL AGAINST THE SPLASHING OF HOT METAL.
References Cited (Backward Citations)
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US338616A
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US1312168A
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US1211884A
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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) | 1968-08-02 | 1969-02-01 | 1969-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-02 | 1973-02-01 | 1973-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-02 | 1977-02-01 | 1977-08-03 | $7700.00 | Window Closed / Lapsed |