Patent US2808623A successfully refreshed from Google Patents.
US2808623A
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US
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Method for casting tubular members
Assignee: Westinghouse Electric Corp
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Filing: 1953-10-30
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Granted: 1957-10-08
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Expires: 1973-10-30
Abstract
No abstract record available.
Inventors
- 👤 Newton C Foster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:25
CPC Classifications
B; B29; B29D; B29D23/00; B29C; B29C39/00; B29C48/00; B29C48/03; B29C48/09; B29C48/10; B29K; B29K2995/00; B29K2995/0037; B29K2995/0072
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
84 words
A PROCESS FOR PREPARING A TUBLAR MEMBER HAVING A PASSAGEWAY EXTENDING LONGITUDINALLY THERETHROUGH WHICH COMPRISES (A) INTRODUCING A LIQUID POLYMERIAZBLE RESINOUS COMPOSITION INTO A MOLD HAVING (1) A MOLDING CAVITY OF CONFIGURATION OF THE TUBE TO BE CAST, AND (2) A CENTRALLY DISPOSED MANDREL EXTENDING BEYOND THE ENDS OF THE CAVITY FOR FORMING A PASSAGEWAYTHROUGH THE TUBE, (B) CURING THE RESINOUS COMPOSITION BY HEATING TO A TEMPERATURE OF FROM 60. TO 150*C. FOR A PERIOD OF TIME SUFFICIENT TO POLYMERIZE SUBSTANTIALLY ALL THE RESINOUS
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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) | 1960-10-07 | 1961-04-08 | 1961-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-07 | 1965-04-08 | 1965-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-07 | 1969-04-08 | 1969-10-08 | $7700.00 | Window Closed / Lapsed |