US3561210A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for cooling engine exhaust pipes
Assignee: BEN W WISEMAN
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Filing: 1969-01-24
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Granted: 1971-02-09
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Expires: 1989-01-24
Abstract
Abstract A METHOD AND APPARATUS FOR COOLING EXHAUST PIPES OF INTERNAL COMBUSTION ENGINES WHEREIN CARBON DIOXIDE, SOTRED IN LIQUID STATE, IS DISPENSED THROUGH A NETWORK OF CONDUITS AND RELEASED IN OR AROUND EACH EXHAUST PIPE TO COOL THE PIPE PREVENTING FIRE WHEN COMBUSTIBLE FLUID COMES INTO CONTACT THEREWITH.
Inventors
- 👤 Ben W Wiseman Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:04
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/02; F01N3/04; E; E21; E21B; E21B35/00; F01N3/043; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |