US2713787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory wall section and method of making the same
Assignee: MH Detrick Co
•
Filing: 1949-10-31
•
Granted: 1955-07-26
•
Expires: 1969-10-31
Abstract
No abstract record available.
Inventors
- 👤 Rose Ralph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:56
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/62
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2125193A
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US2454922A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-07-25 | 1959-01-24 | 1959-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-07-25 | 1963-01-24 | 1963-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-07-25 | 1967-01-24 | 1967-07-26 | $7700.00 | Window Closed / Lapsed |