Patent US3402645A successfully refreshed from Google Patents.
US3402645A
Expired / Lapsed
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Piston assembly
Assignee: Union Carbide Corp
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Filing: 1966-10-03
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Granted: 1968-09-24
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Expires: 1986-10-03
Abstract
No abstract record available.
Inventors
- 👤 Loren C Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:47
CPC Classifications
F; F16; F16J; F16J1/00; F16J1/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
A PISTON ASSEMBLY FOR USE IN AN APPARATUS FOR DIE CASTING A HIGH MELTING POINT METAL COMPRISING: (A) A PISTON SLEEVE COMPOSED OF TITANIUM DIBORIDE, SAID PISTON SLEEVE HAVING AN ANNULAR OPENING THERETHROUGH; (B) A PISTON TIE ROD COMPOSED OF A METAL HAVING A LOWER COEFFICIENT OF THERMAL EXPANSION THAN THE TITANIUM DIBORIDE PISTON SLEEVE EXTENDING THROUGH SAID ANNULAR OPENING IN SAID PISTON SLEEVE, SAID PISTON TIE ROD HAVING A FRONT AND A REAR END;
Claim 2
Dependent Claim
75 words
A PISTON ASSEMBLY FOR USE IN AN APPARATUS FOR DIE CASTING A HIGH MELTING POINT METAL COMPRISING: (A) A PISTON SLEEVE COMPOSED OF TITANIUM DIBORIDE, SAID PISTON SLEEVE HAVING AN ANNULAR OPENING THERETHROUGH; (B) A PISTON TIE ROD COMPOSED OF A METAL HAVING A LOWER COEFFICIENT OF THERMAL EXPANSION THAN THE TITANIUM DIBORIDE PISTON SLEEVE EXTENDING THROUGH SAID ANNULAR OPENING IN SAID PISTON SLEEVE, SAID PISTON TIE ROD HAVING A FRONT AND A REAR END;
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) | 1971-09-24 | 1972-03-25 | 1972-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-24 | 1976-03-25 | 1976-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-24 | 1980-03-25 | 1980-09-24 | $7700.00 | Window Closed / Lapsed |