US2982237A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Externally suspended cast refractory
Assignee: REINTJES
•
Filing: 1958-03-24
•
Granted: 1961-05-02
•
Expires: 1978-03-24
Abstract
No abstract record available.
Inventors
- 👤 Robert P Copeland
- 👤 George P Reintjes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:12
CPC Classifications
F; F27; F27D; F27D1/00; F27D1/04; F27D1/06; F27D1/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
BE502488A
Cited
US1519364A
Cited
US2187669A
Cited
US2476423A
Cited
US2674788A
Cited
GB677696A
Cited
US2829877A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-01 | 1964-10-31 | 1965-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-01 | 1968-10-31 | 1969-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-01 | 1972-10-31 | 1973-05-02 | $7700.00 | Window Closed / Lapsed |