US2880456A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for the production of a light filling from blast furnace, boiler and other slag
Assignee: Individual
•
Filing: 1957-04-08
•
Granted: 1959-04-07
•
Expires: 1977-04-08
Abstract
No abstract record available.
Inventors
- 👤 Kuzela Jan
- 👤 Vavrin Frantisek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:51
CPC Classifications
C; C21; C21B; C21B3/00; C21B3/04; C21B3/06; C21B3/08; C21B2400/00; C21B2400/02; C21B2400/022; C21B2400/024; C21B2400/05; C21B2400/052; C21B2400/054
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB457707A
Cited
US2739348A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-06 | 1962-10-06 | 1963-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-06 | 1966-10-06 | 1967-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-06 | 1970-10-06 | 1971-04-07 | $7700.00 | Window Closed / Lapsed |