Patent US3336020A successfully refreshed from Google Patents.
US3336020A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnace for heating scrap metal
Assignee: Raymond Kaiser Engineers Inc
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Filing: 1964-10-23
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Granted: 1967-08-15
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Expires: 1984-10-23
Abstract
No abstract record available.
Inventors
- 👤 Andrew M Palsak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:21
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/56; C21C5/562; C21C5/565; Y; Y02; Y02P; Y02P10/00; Y02P10/20; Y10; Y10S; Y10S266/00; Y10S266/901
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
A FURNACE FOR HEATING SCRAP METAL COMPRISING: (A) WALLS DEFINING A CAVITY FOR HOLDING SCRAP METAL AND AND HAVING A APERTURE AT THE BOTTOM OF SAID CAVITY; (B) SAID WALLS COMPRISED OF A PLURALITY OF WALLS WITH AT LEAST TWO WALLS BEING DOWNWARDLY CONVERGING WALLS FORMING AT THE BOTTOM OF SAID FURNACE AN APERTURE
Claim 2
Dependent Claim
54 words
A FURNACE FOR HEATING SCRAP METAL COMPRISING: (A) WALLS DEFINING A CAVITY FOR HOLDING SCRAP METAL AND AND HAVING A APERTURE AT THE BOTTOM OF SAID CAVITY; (B) SAID WALLS COMPRISED OF A PLURALITY OF WALLS WITH AT LEAST TWO WALLS BEING DOWNWARDLY CONVERGING WALLS FORMING AT THE BOTTOM OF SAID FURNACE AN APERTURE
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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) | 1970-08-14 | 1971-02-13 | 1971-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-14 | 1975-02-13 | 1975-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-14 | 1979-02-13 | 1979-08-15 | $7700.00 | Window Closed / Lapsed |