Patent US2032448A successfully refreshed from Google Patents.
Patent US3232207A successfully refreshed from Google Patents.
US3232207A
Expired / Lapsed
US
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Balloon closure for industrial stack
Assignee: United States Steel Corp
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Filing: 1964-04-27
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Granted: 1966-02-01
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Expires: 1984-04-27
Abstract
No abstract record available.
Inventors
- 👤 William J Gibbons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:29
CPC Classifications
F; F23; F23J; F23J13/00; F23J13/08; E; E04; E04H; E04H12/00; E04H12/28
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
93 words
A METHOD OF CLOSING A WASTE GAS EXHAUST STACK UTILIZING AN INFLATABLE STACK CLOSURE BAG AND A CONTAINER CONNECTED THERETO FILLED WITH A GAS OF LOW ENOUGH DENSITY TO MAKE SAID CONTAINER AND BAG LIGHTER THAN AIR, SAID METHOD COMPRISING THE STEPS OF ALLOWING SAID CONTAINER AND CLOSURE BAG TO RISE IN SAID STACK WHILE SAID BAG IS COLLAPSED, RESTRAINING SAID CONTAINER AND CONNECTED BAG FROM FURTHER RISING AFTER SAID BAG IS AT LEAST PARTIALLY ABOVE THE TOP OF SAID STACK, AND INFLATING SAID BAG TO AN EXTENT SUFFICIENT TO CLOSE SAID STACK.
References Cited (Backward Citations)
US1180282A
Cited
US2345550A
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US2492800A
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US2753133A
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US2864569A
Cited
US2927609A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-31 | 1969-08-02 | 1970-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-31 | 1973-08-02 | 1974-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-31 | 1977-08-02 | 1978-02-01 | $7700.00 | Window Closed / Lapsed |