US1715449A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory composition and process of making same
Assignee: Pacific Southwest Trust & Savi
•
Filing: 1924-12-11
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Granted: 1929-06-04
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Expires: 1944-12-11
Abstract
No abstract record available.
Inventors
- 👤 Thomas S Curtis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:18
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/42; C04B35/12; C04B35/44
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) | 1932-06-03 | 1932-12-03 | 1933-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-06-03 | 1936-12-03 | 1937-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-06-03 | 1940-12-03 | 1941-06-04 | $7700.00 | Window Closed / Lapsed |