Patent US3302976A successfully refreshed from Google Patents.
US3302976A
Expired / Lapsed
US
⏱️ 0.0 years remaining
De-liner machines for blast furnaces and the like
Assignee: Individual
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Filing: 1965-10-04
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Granted: 1967-02-07
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Expires: 1985-10-04
Abstract
No abstract record available.
Inventors
- 👤 Louis A Grant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:17
CPC Classifications
C; C21; C21B; C21B7/00; C21B7/04; C21B7/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
IN AN APPARATUS FOR REMOVING FURNACE LININGS AND THE LIKE, THE COMBINATION COMPRISING A PLATFORM SHAPED FOR INSERTION THROUGH SAID FURNACE, A CARRIAGE SPACED BENEATH SAID PLATFORM BUT ROTATABLY MOUNTED ON THE UNDERSIDE THEREOF, A PLURALITY OF TELESCOPING BOOM ASSEMBLIES PIVOTALLY MOUNTED ON THE UNDER SIDE OF SAID CARRIAGE, SAID PIVOT MOUNTINGS BEING DISPOSED TO PERMIT ANGULAR AND VERTICAL DISPLACEMENT OF SAID BOOM ASSEMBLIES, LIFTING MEANS FOR EACH OF SAID BOOM ASSEMBLIES, LIFTING BEING SECURED TO SAID CARRIAGE AT A POSITION SPACED UPWARDLY OF SAID BOOM ASSEMBLIES, A POWER ACTUATED CHIPPING TOOL SECURED TO THE OUTER MOVABLE END OF EACH OF SAID TELESCOPING ASSEMBLIES, AND MEANS FOR ACTUATING SAID TOOLS AND SAID LIFTING MEANS AND FOR ROTATING SAID CARRIAGE.
Claim 2
Dependent Claim
119 words
IN AN APPARATUS FOR REMOVING FURNACE LININGS AND THE LIKE, THE COMBINATION COMPRISING A PLATFORM SHAPED FOR INSERTION THROUGH SAID FURNACE, A CARRIAGE SPACED BENEATH SAID PLATFORM BUT ROTATABLY MOUNTED ON THE UNDERSIDE THEREOF, A PLURALITY OF TELESCOPING BOOM ASSEMBLIES PIVOTALLY MOUNTED ON THE UNDER SIDE OF SAID CARRIAGE, SAID PIVOT MOUNTINGS BEING DISPOSED TO PERMIT ANGULAR AND VERTICAL DISPLACEMENT OF SAID BOOM ASSEMBLIES, LIFTING MEANS FOR EACH OF SAID BOOM ASSEMBLIES, LIFTING BEING SECURED TO SAID CARRIAGE AT A POSITION SPACED UPWARDLY OF SAID BOOM ASSEMBLIES, A POWER ACTUATED CHIPPING TOOL SECURED TO THE OUTER MOVABLE END OF EACH OF SAID TELESCOPING ASSEMBLIES, AND MEANS FOR ACTUATING SAID TOOLS AND SAID LIFTING MEANS AND FOR ROTATING SAID CARRIAGE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-06 | 1970-08-08 | 1971-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-06 | 1974-08-08 | 1975-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-06 | 1978-08-08 | 1979-02-07 | $7700.00 | Window Closed / Lapsed |