Patent US3354793A successfully refreshed from Google Patents.
US3354793A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston for internal combustion engines
Assignee: Mahle GmbH
•
Filing: 1965-10-04
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Granted: 1967-11-28
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Expires: 1985-10-04
Abstract
No abstract record available.
Inventors
- 👤 Meier Alfred
- 👤 Kohl Eberhard
- 👤 Rossmann Eberhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:10
CPC Classifications
F; F02; F02F; F02F3/00; F02F3/28; F02F3/16; F02F3/18; F02F3/20; F02F3/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
IN AN INTERNAL COMBUSTION ENGINE PISTON HAVING A PISTON HEAD WITH A MEMBER INSERTED THEREIN TO FORM A HOLLOW CHAMBER IN SAID HEAD, AND A CHARGED PARTICLE BEAM WELD IN THE SEAMS BETWEEN SAID HEAD AND SAID MEMBER, THE IMPROVEMENT IN WHICH THE BEAM WELDS EXTEND FROM THE OUTER SURFACE OF THE PISTON HEAD THROUGH THE SEAMS AND INTO THE BODY OF SAID HEAD WITHOUT ENTERING SAID CHAMBER, THE ADJOINING CONTACTING INTERIOR SURFACES BETWEEN SAID HEAD AND SAID MEMBER BEING WELDED BY THE HEAD CONDUCTED TO
Claim 2
Dependent Claim
86 words
IN AN INTERNAL COMBUSTION ENGINE PISTON HAVING A PISTON HEAD WITH A MEMBER INSERTED THEREIN TO FORM A HOLLOW CHAMBER IN SAID HEAD, AND A CHARGED PARTICLE BEAM WELD IN THE SEAMS BETWEEN SAID HEAD AND SAID MEMBER, THE IMPROVEMENT IN WHICH THE BEAM WELDS EXTEND FROM THE OUTER SURFACE OF THE PISTON HEAD THROUGH THE SEAMS AND INTO THE BODY OF SAID HEAD WITHOUT ENTERING SAID CHAMBER, THE ADJOINING CONTACTING INTERIOR SURFACES BETWEEN SAID HEAD AND SAID MEMBER BEING WELDED BY THE HEAD CONDUCTED TO
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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) | 1970-11-27 | 1971-05-29 | 1971-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-27 | 1975-05-29 | 1975-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-27 | 1979-05-29 | 1979-11-28 | $7700.00 | Window Closed / Lapsed |