Patent US2646639A successfully refreshed from Google Patents.
Patent US2820707A successfully refreshed from Google Patents.
US2820707A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Converter
Assignee: Individual
•
Filing: 1954-06-07
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Granted: 1958-01-21
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Expires: 1974-06-07
Abstract
No abstract record available.
Inventors
- 👤 Walker John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:51
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/28; C21C5/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
THE COMBINATION OF A METAL REFINING CONVERTER COMPRISING A HOLLOW VESSEL HAVING AN OPENING AT THE UPPER END THEREOF, A PAIR OF SUBSTANTIALLY FLAT, CONFRONTING INTERIOR WALLS, SPACED APART IN THE LOWER PART OF SAID VESSEL, AND A PIPE ADAPTED TO EMIT A FLUID IN THE SPACE INTERMEDIATE SAID WALLS, SAID PIPE HAVING AN ELONGATED DISCHARGE OUTLET, THE MAJOR AXIS OF SAID OUTLET BEING PARALLEL TO SAID WALLS.
Claim 2
Dependent Claim
68 words
THE COMBINATION OF A METAL REFINING CONVERTER COMPRISING A HOLLOW VESSEL HAVING AN OPENING AT THE UPPER END THEREOF, A PAIR OF SUBSTANTIALLY FLAT, CONFRONTING INTERIOR WALLS, SPACED APART IN THE LOWER PART OF SAID VESSEL, AND A PIPE ADAPTED TO EMIT A FLUID IN THE SPACE INTERMEDIATE SAID WALLS, SAID PIPE HAVING AN ELONGATED DISCHARGE OUTLET, THE MAJOR AXIS OF SAID OUTLET BEING PARALLEL TO SAID WALLS.
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) | 1961-01-20 | 1961-07-22 | 1962-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-20 | 1965-07-22 | 1966-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-20 | 1969-07-22 | 1970-01-21 | $7700.00 | Window Closed / Lapsed |