US2011489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mold for casting basic refractories
Assignee: Saint Gobain Ceramics and Plastics Inc
•
Filing: 1934-02-14
•
Granted: 1935-08-13
•
Expires: 1954-02-14
Abstract
No abstract record available.
Inventors
- 👤 Hobart M Kraner
- 👤 Frederic W Schroeder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:45
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/16; C04B35/18
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) | 1938-08-12 | 1939-02-11 | 1939-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-08-12 | 1943-02-11 | 1943-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-08-12 | 1947-02-11 | 1947-08-13 | $7700.00 | Window Closed / Lapsed |