US2597501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blast furnace support
Assignee: Brassert & Co
•
Filing: 1947-07-08
•
Granted: 1952-05-20
•
Expires: 1967-07-08
Abstract
No abstract record available.
Inventors
- 👤 Fred E Kling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:38
CPC Classifications
C; C21; C21B; C21B7/00; E; E04; E04H; E04H5/00; E04H5/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US273742A
Cited
US366282A
Cited
US670212A
Cited
US1001167A
Cited
US1703518A
Cited
US1792614A
Cited
US1877460A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-20 | 1955-11-19 | 1956-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-20 | 1959-11-19 | 1960-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-20 | 1963-11-19 | 1964-05-20 | $7700.00 | Window Closed / Lapsed |