US2819802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for and method of operating soaking pit furnace covers
Assignee: Individual
•
Filing: 1952-05-06
•
Granted: 1958-01-14
•
Expires: 1972-05-06
Abstract
No abstract record available.
Inventors
- 👤 William A Hart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:15
CPC Classifications
C; C21; C21D; C21D9/00; C21D9/70
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US438232A
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US1312163A
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US887805A
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US1916734A
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US2021866A
Cited
US2232281A
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US2246921A
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US2340910A
Cited
US2598937A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-13 | 1961-07-15 | 1962-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-13 | 1965-07-15 | 1966-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-13 | 1969-07-15 | 1970-01-14 | $7700.00 | Window Closed / Lapsed |