Patent US1388065A successfully refreshed from Google Patents.
Patent US2285020A successfully refreshed from Google Patents.
US2285020A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of basic refractories
Assignee: —
•
Filing: —
•
Granted: 1942-06-02
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Expires: 1959-06-02
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:33
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/03; C04B35/06; Y; Y10; Y10S; Y10S264/00; Y10S264/36
Claims Analysis
Total Claims: 0
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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) | 1945-06-01 | 1945-12-01 | 1946-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-06-01 | 1949-12-01 | 1950-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-06-01 | 1953-12-01 | 1954-06-02 | $7700.00 | Window Closed / Lapsed |