US2517876A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory brick for use in suspended furnace roofs
Assignee: General Refractories Co
•
Filing: 1944-07-03
•
Granted: 1950-08-08
•
Expires: 1964-07-03
Abstract
No abstract record available.
Inventors
- 👤 Heuer Russell Pearce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:03
CPC Classifications
F; F27; F27D; F27D1/00; F27D1/02; F27D1/021; F27D1/14; F27D1/145; F27D1/147; F27D1/148
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1076240A
Cited
US1948093A
Cited
US1986374A
Cited
US1975235A
Cited
US2247376A
Cited
US2289911A
Cited
US2270297A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-07 | 1954-02-06 | 1954-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-07 | 1958-02-06 | 1958-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-07 | 1962-02-06 | 1962-08-08 | $7700.00 | Window Closed / Lapsed |