US2979322A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnace pressure control
Assignee: Midland Ross Corp
•
Filing: 1957-04-03
•
Granted: 1961-04-11
•
Expires: 1977-04-03
Abstract
No abstract record available.
Inventors
- 👤 Jr William H Dailey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:08
CPC Classifications
F; F23; F23L; F23L17/00; F23L17/16; F23L11/00; F23L5/00; F23L5/04; F23L2700/00; F23L2700/001
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US468306A
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US1189623A
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US1488051A
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US1612838A
Cited
GB281969A
Cited
US1869891A
Cited
US2120563A
Cited
US2397870A
Cited
US2744687A
Cited
US2722372A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-10 | 1964-10-10 | 1965-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-10 | 1968-10-10 | 1969-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-10 | 1972-10-10 | 1973-04-11 | $7700.00 | Window Closed / Lapsed |