US3173499A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mineral piercing apparatus
Assignee: Union Carbide Canada Ltd
•
Filing: 1961-12-08
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Granted: 1965-03-16
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Expires: 1981-12-08
Abstract
No abstract record available.
Inventors
- 👤 John W Ross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:22
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/14; F; F23; F23D; F23D11/00; F23D11/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
165 words
A BLOWPIPE FOR THERMALLY WORKING MINERAL BODIES AND THE LIKE COMPRISING A CYLINDRICAL MEMBER HAVING A FORWARD END; A TUBULAR BAFFLE CONCENTRICALLY POSITIONED WITHIN AND SET BACK FROM THE FORWARD END OF SAID CYLINDRICAL MEMBER; AN AIR INJECTOR HAVING A PLURALITY OF ORIFICES POSITIONED AXIALLY AROUND THE CIRCUMFERENCE THEREOF AND BEING SECURED WITHIN THE SAID BAFFLE; MEANS FOR SUPPLYING PRIMARY AIR TO SAID AIR INJECTOR; A FUEL ININJECTION NOZZLE MOUNTED ON SAID AIR INJECTOR WITHIN THE CIRCUMFERENCE OF ORIFICES ON SAID AIR INJECTOR AND EXTENDING INTO A COMBUSTION CHAMBER CLOSED AT ONE END BY SAID AIR INJECTOR AND NOZZLE AND DEFINED BY THE WALL OF SAID BAFFLE AND SAID CYLINDRICAL MEMBER; MEANS FOR SUPPLYING FUEL TO SAID FUEL INJECTION NOZZLE; MEANS PROVIDED ADJACENT SAID FUEL INJECTION NOZZLE FOR INTERNALLY IGNITING SAID FUEL AND AIR; MEANS FOR SUPPLYING SECONDARY AIR TO SAID COMBUSTION CHAMBER THROUGH SAID BAFFLE; AND A DISCHARGE NOZZLE CARRIED BY THE FORWARD END OF SAID CYLINDRICAL MEMBER AND COMMUNICATING WITH SAID COMBUSTION CHAMBER.
Claim 2
Dependent Claim
165 words
A BLOWPIPE FOR THERMALLY WORKING MINERAL BODIES AND THE LIKE COMPRISING A CYLINDRICAL MEMBER HAVING A FORWARD END; A TUBULAR BAFFLE CONCENTRICALLY POSITIONED WITHIN AND SET BACK FROM THE FORWARD END OF SAID CYLINDRICAL MEMBER; AN AIR INJECTOR HAVING A PLURALITY OF ORIFICES POSITIONED AXIALLY AROUND THE CIRCUMFERENCE THEREOF AND BEING SECURED WITHIN THE SAID BAFFLE; MEANS FOR SUPPLYING PRIMARY AIR TO SAID AIR INJECTOR; A FUEL ININJECTION NOZZLE MOUNTED ON SAID AIR INJECTOR WITHIN THE CIRCUMFERENCE OF ORIFICES ON SAID AIR INJECTOR AND EXTENDING INTO A COMBUSTION CHAMBER CLOSED AT ONE END BY SAID AIR INJECTOR AND NOZZLE AND DEFINED BY THE WALL OF SAID BAFFLE AND SAID CYLINDRICAL MEMBER; MEANS FOR SUPPLYING FUEL TO SAID FUEL INJECTION NOZZLE; MEANS PROVIDED ADJACENT SAID FUEL INJECTION NOZZLE FOR INTERNALLY IGNITING SAID FUEL AND AIR; MEANS FOR SUPPLYING SECONDARY AIR TO SAID COMBUSTION CHAMBER THROUGH SAID BAFFLE; AND A DISCHARGE NOZZLE CARRIED BY THE FORWARD END OF SAID CYLINDRICAL MEMBER AND COMMUNICATING WITH SAID COMBUSTION CHAMBER.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-15 | 1968-09-14 | 1969-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-15 | 1972-09-14 | 1973-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-15 | 1976-09-14 | 1977-03-16 | $7700.00 | Window Closed / Lapsed |