US2670698A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnace roof
Assignee: Republic Steel Corp
•
Filing: 1951-01-26
•
Granted: 1954-03-02
•
Expires: 1971-01-26
Abstract
No abstract record available.
Inventors
- 👤 Clarence G Poth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:50
CPC Classifications
F; F27; F27D; F27D1/00; F27D1/02; F27B; F27B3/00; F27B3/10; F27B3/12; F27B3/16; F27D1/0003; F27D1/0006
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1672524A
Cited
US1686386A
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US1929073A
Cited
US2068863A
Cited
US2085837A
Cited
FR807010A
Cited
US2216813A
Cited
US2236920A
Cited
US2304170A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-01 | 1957-08-31 | 1958-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-01 | 1961-08-31 | 1962-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-01 | 1965-08-31 | 1966-03-02 | $7700.00 | Window Closed / Lapsed |