US2688046A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for melting refractory material
Assignee: Babcock and Wilcox Co
•
Filing: 1951-07-17
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Granted: 1954-08-31
•
Expires: 1971-07-17
Abstract
No abstract record available.
Inventors
- 👤 Jr Charies L Norton
- 👤 Andrew B Stecver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:12
CPC Classifications
C; C04; C04B; C04B33/00; C04B33/32; C04B33/323
Claims Analysis
Total Claims: 0
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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) | 1957-08-30 | 1958-03-01 | 1958-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-30 | 1962-03-01 | 1962-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-30 | 1966-03-01 | 1966-08-31 | $7700.00 | Window Closed / Lapsed |