Patent US3813238A successfully refreshed from Google Patents.
US3813238A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mechanical puddler
Assignee: US REDUCTION ACQUISTION CORP A CORP OF DE
•
Filing: 1972-05-24
•
Granted: 1974-05-28
•
Expires: 1992-05-24
Abstract
Abstract A MECHANICAL PUDDLER FOR STIRRING A MELT WITHIN A FURNACE AND INCLUDNG AN ELONGATED MEMBER CARRIED BY A FRAME AND HAVING A STIRRING MECHANISM CONNECTED TO A FREE END THEREOF WITH DRIVE MEANS COOPERATING WITH THE MEMBER FOR MOVING THE PADDLE IN A CLOSED LOOP HAVING A FIGURE EIGHT CONFIGURATION. THE FRAME IS CAPABLE OF BEING RAISED AND LOWERED RELATIVE TO THE UPPER SURFCE OF THE MELT AND MOVED PARALLEL TO THE SURFACE TO ACT AS A MECHANICL SKIMMER.
Inventors
- 👤 D Salmon
- 👤 E Wierzbicki
- 👤 B Langston
- 👤 D Beegle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:51
CPC Classifications
F; F27; F27D; F27D27/00; B; B01; B01F; B01F31/00; B01F31/44; F27D3/00; F27D3/15; F27D3/1545; F27D3/1554; F27D3/1563
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-05-27 | 1977-11-26 | 1978-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-27 | 1981-11-26 | 1982-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-27 | 1985-11-26 | 1986-05-28 | $7700.00 | Window Closed / Lapsed |