Patent US3587912A successfully refreshed from Google Patents.
US3587912A
Expired / Lapsed
US
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Pressure cap unit with pressure releasing means for radiators of internal combustion engines
Assignee: Denso Corp
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Filing: 1969-04-14
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Granted: 1971-06-28
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Expires: 1989-04-14
Abstract
Abstract A PRESSURE CAP UNIT WITH PRESSURE RELEASING MEANS FOR THE RADIATORS OF INTERNAL COMBUSTION ENGINES, WHICH IS SO DESIGNED THAT IT CANNOT BE REMOVED UNLESS THE INTERNAL PRESSURE OF THE ASSOCIATED RADIATOR HAS BEEN COMPLETELY RELEASED AND WHICH, THEREFORE, CAN BE HANDLED WITH NO DANGER OF SCALD AND IS HIGHLY SAFE.
Inventors
- 👤 Kazuhiro Ohta
- 👤 Kikuo Shimomura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:04
CPC Classifications
F; F01; F01P; F01P11/00; F01P11/02; F01P11/0204; F01P11/0209; F01P11/0247; F01P11/0238; F01P2011/0252; F01P2011/0266
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) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |