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US2434451A
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Refractories
Assignee: Permanente Metals Corp
•
Filing: 1946-06-28
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Granted: 1948-01-13
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Expires: 1966-06-28
Abstract
No abstract record available.
Inventors
- 👤 Leslie W Austin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:47
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2077795A
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US1782295A
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US2026088A
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US2060697A
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US2206131A
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US2278442A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-01-12 | 1951-07-14 | 1952-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-01-12 | 1955-07-14 | 1956-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-01-12 | 1959-07-14 | 1960-01-13 | $7700.00 | Window Closed / Lapsed |