US2980291A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for compounding sinter feed
Assignee: United States Steel Corp
•
Filing: 1959-05-01
•
Granted: 1961-04-18
•
Expires: 1979-05-01
Abstract
No abstract record available.
Inventors
- 👤 Thomas R Schuerger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:00
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/14; C22B1/16; C22B1/20; C22B1/205; G; G01; G01G; G01G19/00; G01G19/22
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1139257A
Cited
US1922883A
Cited
US2100878A
Cited
US2261655A
Cited
US2285765A
Cited
US2623658A
Cited
US2539070A
Cited
US2653786A
Cited
US2638305A
Cited
US2631827A
Cited
US2727733A
Cited
US2826487A
Cited
US2914395A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |