US1517820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of lining furnaces, converters, and the like
Assignee: Individual
•
Filing: 1922-07-03
•
Granted: 1924-12-02
•
Expires: 1942-07-03
Abstract
No abstract record available.
Inventors
- 👤 Bong Eduard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:23
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/14
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) | 1927-12-02 | 1928-06-02 | 1928-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1931-12-02 | 1932-06-02 | 1932-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1935-12-02 | 1936-06-02 | 1936-12-02 | $7700.00 | Window Closed / Lapsed |