Patent US3323503A successfully refreshed from Google Patents.
US3323503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pistons comprising an inner cooling circuit
Assignee: Individual
•
Filing: 1966-10-18
•
Granted: 1967-06-06
•
Expires: 1986-10-18
Abstract
No abstract record available.
Inventors
- 👤 Grosshans Georges Frederic
- 👤 Ollier Jacques Honore Gaspard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:28
CPC Classifications
F; F02; F02F; F02F3/00; F02F3/0015; F02B; F02B23/00; F02B23/02; F02B23/06; F02B23/0636; F02B23/0675; F02F3/0023; F02F3/16; F02F3/20; F02F3/22; F02F3/26; F02B2275/00; F02B2275/14; F02B3/00; F02B3/06; F05; F05C; F05C2201/00; F05C2201/02; F05C2201/021; F05C2201/04; F05C2201/0433; F05C2201/0448; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
AN INTERNAL COMBUSTION ENGINE PISTON WHICH COMPRISES, IN COMBINATION, A PISTON MAIN BODY PROVIDED WITH A TRANSVERSE BORE, A PISTON HEAD FITTING ON SAID BODY, AN ANNULAR CROWN MEMBER SURROUNDING SAID PISTON HEAD AND MOUNTED WITH A FLUIDTIGHT FIT THEREON, SCREWS BEARING ON SAID CROWN MEMBER AND SCREWED IN SAID MAIN BODY FOR SECURING SAID CROWN MEMBER TO SAID MAIN BODY, SAID PISTON HEAD AND SAID CROWN MEMBER BEING SHAPED TO LEAVE BETWEEN THEM A MAIN ANNULAR CHAMBER FOR CIRCULATION OF A COOLING LIQUID,
Claim 2
Dependent Claim
84 words
AN INTERNAL COMBUSTION ENGINE PISTON WHICH COMPRISES, IN COMBINATION, A PISTON MAIN BODY PROVIDED WITH A TRANSVERSE BORE, A PISTON HEAD FITTING ON SAID BODY, AN ANNULAR CROWN MEMBER SURROUNDING SAID PISTON HEAD AND MOUNTED WITH A FLUIDTIGHT FIT THEREON, SCREWS BEARING ON SAID CROWN MEMBER AND SCREWED IN SAID MAIN BODY FOR SECURING SAID CROWN MEMBER TO SAID MAIN BODY, SAID PISTON HEAD AND SAID CROWN MEMBER BEING SHAPED TO LEAVE BETWEEN THEM A MAIN ANNULAR CHAMBER FOR CIRCULATION OF A COOLING LIQUID,
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) | 1970-06-05 | 1970-12-05 | 1971-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-05 | 1974-12-05 | 1975-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-05 | 1978-12-05 | 1979-06-06 | $7700.00 | Window Closed / Lapsed |