US2443424A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brick having low modulus rupture
Assignee: General Refractories Co
•
Filing: 1944-05-12
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Granted: 1948-06-15
•
Expires: 1964-05-12
Abstract
No abstract record available.
Inventors
- 👤 Heuer Russell Pearce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:53
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/03; C04B35/04; C04B35/043; C04B35/047
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1644166A
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US2079066A
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US2068641A
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GB468456A
Cited
DE695856C
Cited
DE679915C
Cited
US2216813A
Cited
US2304170A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-06-15 | 1951-12-15 | 1952-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-15 | 1955-12-15 | 1956-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-15 | 1959-12-15 | 1960-06-15 | $7700.00 | Window Closed / Lapsed |