US2825550A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wind box sealing construction for sintering machines
Assignee: Mcdowell Co Inc
•
Filing: 1955-12-06
•
Granted: 1958-03-04
•
Expires: 1975-12-06
Abstract
No abstract record available.
Inventors
- 👤 Harold E Rowen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:51
CPC Classifications
F; F27; F27B; F27B21/00; F27B21/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1308864A
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US1680345A
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US1199962A
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US1491778A
Cited
US1810313A
Cited
US1774135A
Cited
US2254323A
Cited
US2506569A
Cited
US2563135A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-03 | 1961-09-02 | 1962-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-03 | 1965-09-02 | 1966-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-03 | 1969-09-02 | 1970-03-04 | $7700.00 | Window Closed / Lapsed |