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US3053525A
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Porous refractory concrete element
Assignee: Institut de Recherches de la Siderurgie Francaise IRSID
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Filing: 1960-06-07
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Granted: 1962-09-11
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Expires: 1980-06-07
Abstract
No abstract record available.
Inventors
- 👤 Leroy Pierre
- 👤 Simon Roger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 23:34
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; C04B28/06; B; B22; B22D; B22D1/00; B22D1/002; B22D1/005; C21; C21C; C21C7/00; C21C7/0037; F; F27; F27D; F27D1/00; F27D1/0003; F27D1/003; F27D1/12; F27D1/16; F27D1/1678; F27D3/00; F27D3/16; F27D2003/161; F27D9/00; F27D2009/0002; F27D2009/0005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-10 | 1966-03-12 | 1966-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-10 | 1970-03-12 | 1970-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-10 | 1974-03-12 | 1974-09-11 | $7700.00 | Window Closed / Lapsed |