Patent US3755543A successfully refreshed from Google Patents.
US3755543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air cooled porous metal pipe for use in feedstock injection assembly
Assignee: Continental Carbon Co
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Filing: 1971-08-16
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Granted: 1973-08-28
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Expires: 1991-08-16
Abstract
Abstract A POROUS METAL PIPE SURROUNDS A FLUIDS CONDUIT WHICH IS SUBJECTED TO HIGH TEMPERATURES, SO THAT AIR CAN BE PASSED INTO THE ANNULUS BETWEEN THE TWO PIPES AND THROUGH THE POROUS PIPE WALL TO ASSIST IN COOLING THE OIL INJECTOR PIPE. FOR EXAMPLE, THE OIL FEEDSTOCK PIPE IN A CARBON BLACK REACTOR IS SURROUNDED BY A POROUS METAL PIPE INTO WHICH AXIAL AIR IS PASSED.
Inventors
- 👤 B Latham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:02
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/50; B; B01; B01J; B01J19/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |