Patent US2989908A successfully refreshed from Google Patents.
Patent US3533905A successfully refreshed from Google Patents.
US3533905A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fused-cast composite refractory bodies and process of producing same
Assignee: Unifrax I LLC
•
Filing: 1967-02-13
•
Granted: 1970-10-13
•
Expires: 1987-02-13
Abstract
No abstract record available.
Inventors
- 👤 Eugene L O'meara Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:34
CPC Classifications
B; B28; B28B; B28B1/00; B28B1/54; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1879676A
Cited
US2185772A
Cited
US2154153A
Cited
US2201049A
Cited
US2596990A
Cited
US2949704A
Cited
US3120453A
Cited
US3187502A
Cited
US3165864A
Cited
US3233994A
Cited
US3146281A
Cited
US3261138A
Cited
US3468750A
Cited
US3468752A
Cited
US3446643A
Cited
US3459630A
Cited
US3453172A
Cited
US3472729A
Cited
US3467745A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-12 | 1974-04-13 | 1974-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-12 | 1978-04-13 | 1978-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-12 | 1982-04-13 | 1982-10-13 | $7700.00 | Window Closed / Lapsed |