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US3547832A
Expired / Lapsed
US
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Shaped refractory parts
Assignee: Dynamit Nobel AG
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Filing: 1968-06-24
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Granted: 1970-12-15
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Expires: 1988-06-24
Abstract
No abstract record available.
Inventors
- 👤 Karl Hass
- 👤 Georg Schinke
- 👤 Ferd Langenhoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:19
CPC Classifications
B; B01; B01J; B01J37/00; B01J37/08; B01J37/082; B01J37/086
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) | 1973-12-14 | 1974-06-15 | 1974-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-14 | 1978-06-15 | 1978-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-14 | 1982-06-15 | 1982-12-15 | $7700.00 | Window Closed / Lapsed |